202120101 has 12 divisors (see below), whose sum is σ = 292088160. Its totient is φ = 134683560.

The previous prime is 202120099. The next prime is 202120103. The reversal of 202120101 is 101021202.

It is an interprime number because it is at equal distance from previous prime (202120099) and next prime (202120103).

It is not a de Polignac number, because 202120101 - 2¹ = 202120099 is a prime.

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 (202120103) 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, 22960 + ... + 30518.

It is an arithmetic number, because the mean of its divisors is an integer number (24340680).

Almost surely, 2^202120101 is an apocalyptic number.

It is an amenable number.

202120101 is a deficient number, since it is larger than the sum of its proper divisors (89968059).

202120101 is a wasteful number, since it uses less digits than its factorization.

202120101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10536 (or 10533 counting only the distinct ones).

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

The square root of 202120101 is about 14216.8949141506. The cubic root of 202120101 is about 586.8626930088.

Adding to 202120101 its reverse (101021202), we get a palindrome (303141303).

It can be divided in two parts, 2021 and 20101, that added together give a palindrome (22122).

The spelling of 202120101 in words is "two hundred two million, one hundred twenty thousand, one hundred one".