21030212232 has 48 divisors (see below), whose sum is σ = 57158141040. Its totient is φ = 6985293408.

The previous prime is 21030212209. The next prime is 21030212267. The reversal of 21030212232 is 23221203012.

21030212232 is a `hidden beast` number, since 210 + 302 + 122 + 32 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 495678 + ... + 536429.

It is an arithmetic number, because the mean of its divisors is an integer number (1190794605).

Almost surely, 2^21030212232 is an apocalyptic number.

It is an amenable number.

21030212232 is an abundant number, since it is smaller than the sum of its proper divisors (36127928808).

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

21030212232 is a wasteful number, since it uses less digits than its factorization.

21030212232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032402 (or 1032395 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21030212232 its reverse (23221203012), we get a palindrome (44251415244).

The spelling of 21030212232 in words is "twenty-one billion, thirty million, two hundred twelve thousand, two hundred thirty-two".