21140210100 has 36 divisors (see below), whose sum is σ = 61165675424. Its totient is φ = 5637389280.

The previous prime is 21140210089. The next prime is 21140210129. The reversal of 21140210100 is 101204112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

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, 35233384 + ... + 35233983.

Almost surely, 2^21140210100 is an apocalyptic number.

21140210100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21140210100 is an abundant number, since it is smaller than the sum of its proper divisors (40025465324).

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

21140210100 is a wasteful number, since it uses less digits than its factorization.

21140210100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70467384 (or 70467377 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21140210100 its reverse (101204112), we get a palindrome (21241414212).

The spelling of 21140210100 in words is "twenty-one billion, one hundred forty million, two hundred ten thousand, one hundred".