1231021332 has 18 divisors (see below), whose sum is σ = 3111748458. Its totient is φ = 410340432.

The previous prime is 1231021327. The next prime is 1231021361. The reversal of 1231021332 is 2331201321.

1231021332 is a `hidden beast` number, since 1 + 2 + 310 + 21 + 332 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1230325776 + 695556 = 35076^2 + 834^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-4 number, since 4×1231021332⁴ (a number of 37 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17097483 + ... + 17097554.

Almost surely, 2^1231021332 is an apocalyptic number.

1231021332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1231021332 is an abundant number, since it is smaller than the sum of its proper divisors (1880727126).

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

1231021332 is a wasteful number, since it uses less digits than its factorization.

1231021332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34195047 (or 34195042 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1231021332 is about 35085.9135836592. The cubic root of 1231021332 is about 1071.7377451680.

Adding to 1231021332 its reverse (2331201321), we get a palindrome (3562222653).

The spelling of 1231021332 in words is "one billion, two hundred thirty-one million, twenty-one thousand, three hundred thirty-two".