21101201020002 has 32 divisors (see below), whose sum is σ = 42832825117632. Its totient is φ = 6928665790464.

The previous prime is 21101201019971. The next prime is 21101201020019. The reversal of 21101201020002 is 20002010210112.

It is a self number, because there is not a number n which added to its sum of digits gives 21101201020002.

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, 37100958 + ... + 37665414.

It is an arithmetic number, because the mean of its divisors is an integer number (1338525784926).

Almost surely, 2^{21101201020002} is an apocalyptic number.

21101201020002 is an abundant number, since it is smaller than the sum of its proper divisors (21731624097630).

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

21101201020002 is a wasteful number, since it uses less digits than its factorization.

21101201020002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657522.

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

Adding to 21101201020002 its reverse (20002010210112), we get a palindrome (41103211230114).

The spelling of 21101201020002 in words is "twenty-one trillion, one hundred one billion, two hundred one million, twenty thousand, two".