1231122021132 has 48 divisors (see below), whose sum is σ = 2935681201152. Its totient is φ = 401376554880.

The previous prime is 1231122021097. The next prime is 1231122021149. The reversal of 1231122021132 is 2311202211321.

It is a super-2 number, since 2×1231122021132² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1231122021099 and 1231122021108.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129888 + ... + 1574520.

It is an arithmetic number, because the mean of its divisors is an integer number (61160025024).

Almost surely, 2^{1231122021132} is an apocalyptic number.

1231122021132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1231122021132 is an abundant number, since it is smaller than the sum of its proper divisors (1704559180020).

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

1231122021132 is a wasteful number, since it uses less digits than its factorization.

1231122021132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446198 (or 1446196 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 1231122021132 its reverse (2311202211321), we get a palindrome (3542324232453).

The spelling of 1231122021132 in words is "one trillion, two hundred thirty-one billion, one hundred twenty-two million, twenty-one thousand, one hundred thirty-two".