1131231021252 has 24 divisors (see below), whose sum is σ = 2660322825216. Its totient is φ = 374107896288.

The previous prime is 1131231021223. The next prime is 1131231021299. The reversal of 1131231021252 is 2521201321311.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371137263 + ... + 371140310.

It is an arithmetic number, because the mean of its divisors is an integer number (110846784384).

Almost surely, 2^{1131231021252} is an apocalyptic number.

1131231021252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1131231021252 is an abundant number, since it is smaller than the sum of its proper divisors (1529091803964).

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

1131231021252 is a wasteful number, since it uses less digits than its factorization.

1131231021252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742277707 (or 742277705 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

Adding to 1131231021252 its reverse (2521201321311), we get a palindrome (3652432342563).

The spelling of 1131231021252 in words is "one trillion, one hundred thirty-one billion, two hundred thirty-one million, twenty-one thousand, two hundred fifty-two".