21001002232 has 32 divisors (see below), whose sum is σ = 45119692800. Its totient is φ = 8976920544.

The previous prime is 21001002229. The next prime is 21001002257. The reversal of 21001002232 is 23220010012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 468132 + ... + 511027.

It is an arithmetic number, because the mean of its divisors is an integer number (1409990400).

Almost surely, 2^21001002232 is an apocalyptic number.

It is an amenable number.

21001002232 is an abundant number, since it is smaller than the sum of its proper divisors (24118690568).

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

21001002232 is a wasteful number, since it uses less digits than its factorization.

21001002232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979555 (or 979551 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21001002232 its reverse (23220010012), we get a palindrome (44221012244).

The spelling of 21001002232 in words is "twenty-one billion, one million, two thousand, two hundred thirty-two".