21201011100102 has 64 divisors (see below), whose sum is σ = 44920685721600. Its totient is φ = 6647680005120.

The previous prime is 21201011100079. The next prime is 21201011100121. The reversal of 21201011100102 is 20100111010212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2732437299 + ... + 2732445057.

It is an arithmetic number, because the mean of its divisors is an integer number (701885714400).

Almost surely, 2^{21201011100102} is an apocalyptic number.

21201011100102 is an abundant number, since it is smaller than the sum of its proper divisors (23719674621498).

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

21201011100102 is a wasteful number, since it uses less digits than its factorization.

21201011100102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18901.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21201011100102 its reverse (20100111010212), we get a palindrome (41301122110314).

The spelling of 21201011100102 in words is "twenty-one trillion, two hundred one billion, eleven million, one hundred thousand, one hundred two".