21102020202022 has 16 divisors (see below), whose sum is σ = 31958931750912. Its totient is φ = 10449338082120.

The previous prime is 21102020201993. The next prime is 21102020202031. The reversal of 21102020202022 is 22020202020112.

It is a junction number, because it is equal to n+sod(n) for n = 21102020201987 and 21102020202005.

It is a congruent number.

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, 73639254 + ... + 73925257.

It is an arithmetic number, because the mean of its divisors is an integer number (1997433234432).

Almost surely, 2^{21102020202022} is an apocalyptic number.

21102020202022 is a deficient number, since it is larger than the sum of its proper divisors (10856911548890).

21102020202022 is a wasteful number, since it uses less digits than its factorization.

21102020202022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147565203.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21102020202022 its reverse (22020202020112), we get a palindrome (43122222222134).

The spelling of 21102020202022 in words is "twenty-one trillion, one hundred two billion, twenty million, two hundred two thousand, twenty-two".