202102101021121 has 4 divisors (see below), whose sum is σ = 230973829738432. Its totient is φ = 173230372303812.

The previous prime is 202102101021089. The next prime is 202102101021133. The reversal of 202102101021121 is 121120101201202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 202102101021121 - 2⁵ = 202102101021089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202102101021095 and 202102101021104.

It is not an unprimeable number, because it can be changed into a prime (202102101001121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14435864358645 + ... + 14435864358658.

It is an arithmetic number, because the mean of its divisors is an integer number (57743457434608).

Almost surely, 2^{202102101021121} is an apocalyptic number.

It is an amenable number.

202102101021121 is a deficient number, since it is larger than the sum of its proper divisors (28871728717311).

202102101021121 is an equidigital number, since it uses as much as digits as its factorization.

202102101021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28871728717310.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 202102101021121 its reverse (121120101201202), we get a palindrome (323222202222323).

The spelling of 202102101021121 in words is "two hundred two trillion, one hundred two billion, one hundred one million, twenty-one thousand, one hundred twenty-one".