1121221232220 has 96 divisors (see below), whose sum is σ = 3143305751040. Its totient is φ = 298622483200.

The previous prime is 1121221232213. The next prime is 1121221232233. The reversal of 1121221232220 is 222321221211.

It is a super-2 number, since 2×1121221232220² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 251900995 + ... + 251905445.

It is an arithmetic number, because the mean of its divisors is an integer number (32742768240).

Almost surely, 2^{1121221232220} is an apocalyptic number.

1121221232220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121221232220 is an abundant number, since it is smaller than the sum of its proper divisors (2022084518820).

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

1121221232220 is a wasteful number, since it uses less digits than its factorization.

1121221232220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8715 (or 8713 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 1121221232220 its reverse (222321221211), we get a palindrome (1343542453431).

The spelling of 1121221232220 in words is "one trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred thirty-two thousand, two hundred twenty".