1121211222210 has 96 divisors (see below), whose sum is σ = 2945097438192. Its totient is φ = 295920230400.

The previous prime is 1121211222199. The next prime is 1121211222227. The reversal of 1121211222210 is 122221121211.

1121211222210 is a `hidden beast` number, since 1 + 1 + 21 + 211 + 222 + 210 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 822364226649 + 298846995561 = 906843^2 + 546669^2 .

It is a super-2 number, since 2×1121211222210² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26312442 + ... + 26355018.

Almost surely, 2^{1121211222210} is an apocalyptic number.

1121211222210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121211222210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1472548719096).

1121211222210 is an abundant number, since it is smaller than the sum of its proper divisors (1823886215982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1121211222210 is a wasteful number, since it uses less digits than its factorization.

1121211222210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45588 (or 45585 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1121211222210 its reverse (122221121211), we get a palindrome (1243432343421).

It can be divided in two parts, 112121 and 1222210, that added together give a palindrome (1334331).

The spelling of 1121211222210 in words is "one trillion, one hundred twenty-one billion, two hundred eleven million, two hundred twenty-two thousand, two hundred ten".