202022121021 has 12 divisors (see below), whose sum is σ = 313340432832. Its totient is φ = 115441211928.

The previous prime is 202022121011. The next prime is 202022121029. The reversal of 202022121021 is 120121220202.

It is not a de Polignac number, because 202022121021 - 2¹⁴ = 202022104637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202022121029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 687149925 + ... + 687150218.

It is an arithmetic number, because the mean of its divisors is an integer number (26111702736).

Almost surely, 2^202022121021 is an apocalyptic number.

202022121021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

202022121021 is a deficient number, since it is larger than the sum of its proper divisors (111318311811).

202022121021 is a wasteful number, since it uses less digits than its factorization.

202022121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374300160 (or 1374300153 counting only the distinct ones).

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

Adding to 202022121021 its reverse (120121220202), we get a palindrome (322143341223).

The spelling of 202022121021 in words is "two hundred two billion, twenty-two million, one hundred twenty-one thousand, twenty-one".