202123010121 has 8 divisors (see below), whose sum is σ = 271150705440. Its totient is φ = 133921994112.

The previous prime is 202123010041. The next prime is 202123010171. The reversal of 202123010121 is 121010321202.

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

It is not a de Polignac number, because 202123010121 - 2⁷ = 202123009993 is a prime.

It is a super-2 number, since 2×202123010121² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 202123010121.

It is not an unprimeable number, because it can be changed into a prime (202123010171) 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, 206669256 + ... + 206670233.

It is an arithmetic number, because the mean of its divisors is an integer number (33893838180).

Almost surely, 2^202123010121 is an apocalyptic number.

It is an amenable number.

202123010121 is a deficient number, since it is larger than the sum of its proper divisors (69027695319).

202123010121 is a wasteful number, since it uses less digits than its factorization.

202123010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413339655.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 202123010121 its reverse (121010321202), we get a palindrome (323133331323).

The spelling of 202123010121 in words is "two hundred two billion, one hundred twenty-three million, ten thousand, one hundred twenty-one".