21000122021202 has 16 divisors (see below), whose sum is σ = 42002984147040. Its totient is φ = 6999583989632.

The previous prime is 21000122021143. The next prime is 21000122021233. The reversal of 21000122021202 is 20212022100012.

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, 114071388 + ... + 114255335.

It is an arithmetic number, because the mean of its divisors is an integer number (2625186509190).

Almost surely, 2^{21000122021202} is an apocalyptic number.

21000122021202 is an abundant number, since it is smaller than the sum of its proper divisors (21002862125838).

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

21000122021202 is a wasteful number, since it uses less digits than its factorization.

21000122021202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228342057.

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

Adding to 21000122021202 its reverse (20212022100012), we get a palindrome (41212144121214).

It can be divided in two parts, 2100012 and 2021202, that multiplied together give a palindrome (4244548454424).

The spelling of 21000122021202 in words is "twenty-one trillion, one hundred twenty-two million, twenty-one thousand, two hundred two".