202102101 has 8 divisors (see below), whose sum is σ = 299410560. Its totient is φ = 134734716.

The previous prime is 202102097. The next prime is 202102123. The reversal of 202102101 is 101201202.

202102101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 202102101 - 2² = 202102097 is a prime.

It is a super-2 number, since 2×202102101² = 81690518457228402, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202102141) 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, 3742605 + ... + 3742658.

It is an arithmetic number, because the mean of its divisors is an integer number (37426320).

Almost surely, 2^202102101 is an apocalyptic number.

It is an amenable number.

202102101 is a deficient number, since it is larger than the sum of its proper divisors (97308459).

202102101 is an equidigital number, since it uses as much as digits as its factorization.

202102101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7485272 (or 7485266 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 202102101 is about 14216.2618504303. The cubic root of 202102101 is about 586.8452712845.

Adding to 202102101 its reverse (101201202), we get a palindrome (303303303).

The spelling of 202102101 in words is "two hundred two million, one hundred two thousand, one hundred one".