21211301232 has 60 divisors (see below), whose sum is σ = 64758750264. Its totient is φ = 6427666560.

The previous prime is 21211301231. The next prime is 21211301233. The reversal of 21211301232 is 23210311212.

It is an interprime number because it is at equal distance from previous prime (21211301231) and next prime (21211301233).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211301231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6693903 + ... + 6697070.

Almost surely, 2^21211301232 is an apocalyptic number.

21211301232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21211301232 is an abundant number, since it is smaller than the sum of its proper divisors (43547449032).

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

21211301232 is a wasteful number, since it uses less digits than its factorization.

21211301232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13390998 (or 13390989 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21211301232 its reverse (23210311212), we get a palindrome (44421612444).

The spelling of 21211301232 in words is "twenty-one billion, two hundred eleven million, three hundred one thousand, two hundred thirty-two".