202012121222021 has 8 divisors (see below), whose sum is σ = 220389828403584. Its totient is φ = 183636575521920.

The previous prime is 202012121222003. The next prime is 202012121222089. The reversal of 202012121222021 is 120222121210202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 202012121222021 - 2⁶ = 202012121221957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202012121221984 and 202012121222002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202012121222221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 540174941 + ... + 540548786.

It is an arithmetic number, because the mean of its divisors is an integer number (27548728550448).

Almost surely, 2^{202012121222021} is an apocalyptic number.

It is an amenable number.

202012121222021 is a deficient number, since it is larger than the sum of its proper divisors (18377707181563).

202012121222021 is a wasteful number, since it uses less digits than its factorization.

202012121222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080740731.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 202012121222021 its reverse (120222121210202), we get a palindrome (322234242432223).

The spelling of 202012121222021 in words is "two hundred two trillion, twelve billion, one hundred twenty-one million, two hundred twenty-two thousand, twenty-one".