21101011210 has 96 divisors (see below), whose sum is σ = 40937218560. Its totient is φ = 7825593600.

The previous prime is 21101011193. The next prime is 21101011219. The reversal of 21101011210 is 1211010112.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (21101011219) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 58777011 + ... + 58777369.

It is an arithmetic number, because the mean of its divisors is an integer number (426429360).

Almost surely, 2^21101011210 is an apocalyptic number.

21101011210 is a deficient number, since it is larger than the sum of its proper divisors (19836207350).

21101011210 is a wasteful number, since it uses less digits than its factorization.

21101011210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724 (or 701 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21101011210 its reverse (1211010112), we get a palindrome (22312021322).

The spelling of 21101011210 in words is "twenty-one billion, one hundred one million, eleven thousand, two hundred ten".