21113134210 has 48 divisors (see below), whose sum is σ = 46535091840. Its totient is φ = 6857796960.

The previous prime is 21113134201. The next prime is 21113134223. The reversal of 21113134210 is 1243131112.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1124586 + ... + 1143205.

It is an arithmetic number, because the mean of its divisors is an integer number (969481080).

Almost surely, 2^21113134210 is an apocalyptic number.

21113134210 is an abundant number, since it is smaller than the sum of its proper divisors (25421957630).

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

21113134210 is a wasteful number, since it uses less digits than its factorization.

21113134210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2267831 (or 2267824 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21113134210 its reverse (1243131112), we get a palindrome (22356265322).

The spelling of 21113134210 in words is "twenty-one billion, one hundred thirteen million, one hundred thirty-four thousand, two hundred ten".