1121022201220 has 12 divisors (see below), whose sum is σ = 2354146622604. Its totient is φ = 448408880480.

The previous prime is 1121022201199. The next prime is 1121022201401. The reversal of 1121022201220 is 221022201211.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 590598398016 + 530423803204 = 768504^2 + 728302^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1121022201194 and 1121022201203.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28025555011 + ... + 28025555050.

It is an arithmetic number, because the mean of its divisors is an integer number (196178885217).

Almost surely, 2^{1121022201220} is an apocalyptic number.

1121022201220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121022201220 is an abundant number, since it is smaller than the sum of its proper divisors (1233124421384).

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

1121022201220 is a wasteful number, since it uses less digits than its factorization.

1121022201220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56051110070 (or 56051110068 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1121022201220 its reverse (221022201211), we get a palindrome (1342044402431).

Subtracting from 1121022201220 its reverse (221022201211), we obtain a palindrome (900000000009).

The spelling of 1121022201220 in words is "one trillion, one hundred twenty-one billion, twenty-two million, two hundred one thousand, two hundred twenty".