202122210121 has 12 divisors (see below), whose sum is σ = 230385331920. Its totient is φ = 176754642480.

The previous prime is 202122210097. The next prime is 202122210137. The reversal of 202122210121 is 121012221202.

It is a happy number.

It is not a de Polignac number, because 202122210121 - 2⁹ = 202122209609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202122210095 and 202122210104.

It is not an unprimeable number, because it can be changed into a prime (202122210151) 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, 31470195 + ... + 31476616.

It is an arithmetic number, because the mean of its divisors is an integer number (19198777660).

Almost surely, 2^202122210121 is an apocalyptic number.

It is an amenable number.

202122210121 is a deficient number, since it is larger than the sum of its proper divisors (28263121799).

202122210121 is a wasteful number, since it uses less digits than its factorization.

202122210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62946856 (or 62946843 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 202122210121 its reverse (121012221202), we get a palindrome (323134431323).

The spelling of 202122210121 in words is "two hundred two billion, one hundred twenty-two million, two hundred ten thousand, one hundred twenty-one".