222012202202021 has 24 divisors (see below), whose sum is σ = 281751425030304. Its totient is φ = 172987781410080.

The previous prime is 222012202202009. The next prime is 222012202202023. The reversal of 222012202202021 is 120202202210222.

It is a de Polignac number, because none of the positive numbers 2^k-222012202202021 is a prime.

It is a super-2 number, since 2×222012202202021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 222012202201984 and 222012202202002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222012202202023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 284606 + ... + 21073808.

It is an arithmetic number, because the mean of its divisors is an integer number (11739642709596).

Almost surely, 2^{222012202202021} is an apocalyptic number.

It is an amenable number.

222012202202021 is a deficient number, since it is larger than the sum of its proper divisors (59739222828283).

222012202202021 is a wasteful number, since it uses less digits than its factorization.

222012202202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20809041 (or 20809034 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 222012202202021 its reverse (120202202210222), we get a palindrome (342214404412243).

The spelling of 222012202202021 in words is "two hundred twenty-two trillion, twelve billion, two hundred two million, two hundred two thousand, twenty-one".