21220101202002 has 16 divisors (see below), whose sum is σ = 42617776475520. Its totient is φ = 7043771388752.

The previous prime is 21220101201989. The next prime is 21220101202033. The reversal of 21220101202002 is 20020210102212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7398918093 + ... + 7398920960.

It is an arithmetic number, because the mean of its divisors is an integer number (2663611029720).

Almost surely, 2^{21220101202002} is an apocalyptic number.

21220101202002 is an abundant number, since it is smaller than the sum of its proper divisors (21397675273518).

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

21220101202002 is a wasteful number, since it uses less digits than its factorization.

21220101202002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14797839297.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21220101202002 its reverse (20020210102212), we get a palindrome (41240311304214).

The spelling of 21220101202002 in words is "twenty-one trillion, two hundred twenty billion, one hundred one million, two hundred two thousand, two".