1231021132 has 12 divisors (see below), whose sum is σ = 2350131336. Its totient is φ = 559555040.

The previous prime is 1231021123. The next prime is 1231021139. The reversal of 1231021132 is 2311201321.

It is a super-2 number, since 2×1231021132² = 3030826054861122848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1231021139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13988833 + ... + 13988920.

It is an arithmetic number, because the mean of its divisors is an integer number (195844278).

Almost surely, 2^1231021132 is an apocalyptic number.

It is an amenable number.

1231021132 is a deficient number, since it is larger than the sum of its proper divisors (1119110204).

1231021132 is a wasteful number, since it uses less digits than its factorization.

1231021132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27977768 (or 27977766 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1231021132 is about 35085.9107335124. The cubic root of 1231021132 is about 1071.7376871274.

Adding to 1231021132 its reverse (2311201321), we get a palindrome (3542222453).

The spelling of 1231021132 in words is "one billion, two hundred thirty-one million, twenty-one thousand, one hundred thirty-two".