21101100202002 has 32 divisors (see below), whose sum is σ = 45368546918400. Its totient is φ = 6521728616208.

The previous prime is 21101100201959. The next prime is 21101100202027. The reversal of 21101100202002 is 20020200110112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1969115602 + ... + 1969126317.

It is an arithmetic number, because the mean of its divisors is an integer number (1417767091200).

Almost surely, 2^{21101100202002} is an apocalyptic number.

21101100202002 is an abundant number, since it is smaller than the sum of its proper divisors (24267446716398).

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

21101100202002 is a wasteful number, since it uses less digits than its factorization.

21101100202002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3938241990.

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

Adding to 21101100202002 its reverse (20020200110112), we get a palindrome (41121300312114).

The spelling of 21101100202002 in words is "twenty-one trillion, one hundred one billion, one hundred million, two hundred two thousand, two".