21140232212 has 12 divisors (see below), whose sum is σ = 40358625216. Its totient is φ = 9609196440.

The previous prime is 21140232107. The next prime is 21140232221. The reversal of 21140232212 is 21223204112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240229868 + ... + 240229955.

It is an arithmetic number, because the mean of its divisors is an integer number (3363218768).

Almost surely, 2^21140232212 is an apocalyptic number.

21140232212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21140232212 is a deficient number, since it is larger than the sum of its proper divisors (19218393004).

21140232212 is a wasteful number, since it uses less digits than its factorization.

21140232212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480459838 (or 480459836 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21140232212 its reverse (21223204112), we get a palindrome (42363436324).

It can be divided in two parts, 21140 and 232212, that added together give a palindrome (253352).

The spelling of 21140232212 in words is "twenty-one billion, one hundred forty million, two hundred thirty-two thousand, two hundred twelve".