21213110140 has 48 divisors (see below), whose sum is σ = 45148938912. Its totient is φ = 8371454976.

The previous prime is 21213110053. The next prime is 21213110141. The reversal of 21213110140 is 4101131212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21213110141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 422872 + ... + 470368.

It is an arithmetic number, because the mean of its divisors is an integer number (940602894).

Almost surely, 2^21213110140 is an apocalyptic number.

21213110140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21213110140 is an abundant number, since it is smaller than the sum of its proper divisors (23935828772).

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

21213110140 is a wasteful number, since it uses less digits than its factorization.

21213110140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47806 (or 47804 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21213110140 its reverse (4101131212), we get a palindrome (25314241352).

The spelling of 21213110140 in words is "twenty-one billion, two hundred thirteen million, one hundred ten thousand, one hundred forty".