1121201121210 has 256 divisors, whose sum is σ = 2945170077696. Its totient is φ = 272056320000.

The previous prime is 1121201121203. The next prime is 1121201121233. The reversal of 1121201121210 is 121211021211.

It is a happy number.

It is a super-2 number, since 2×1121201121210² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1121201121210.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1365652600 + ... + 1365653420.

It is an arithmetic number, because the mean of its divisors is an integer number (11504570616).

Almost surely, 2^{1121201121210} is an apocalyptic number.

1121201121210 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 1121201121210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1472585038848).

1121201121210 is an abundant number, since it is smaller than the sum of its proper divisors (1823968956486).

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

1121201121210 is a wasteful number, since it uses less digits than its factorization.

1121201121210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1121201121210 its reverse (121211021211), we get a palindrome (1242412142421).

Subtracting from 1121201121210 its reverse (121211021211), we obtain a palindrome (999990099999).

The spelling of 1121201121210 in words is "one trillion, one hundred twenty-one billion, two hundred one million, one hundred twenty-one thousand, two hundred ten".