202120210101 has 8 divisors (see below), whose sum is σ = 269497926720. Its totient is φ = 134744650112.

The previous prime is 202120210079. The next prime is 202120210139. The reversal of 202120210101 is 101012021202.

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

It is a cyclic number.

It is not a de Polignac number, because 202120210101 - 2⁵ = 202120210069 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202120211101) 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, 306081 + ... + 705638.

It is an arithmetic number, because the mean of its divisors is an integer number (33687240840).

Almost surely, 2^202120210101 is an apocalyptic number.

It is an amenable number.

202120210101 is a deficient number, since it is larger than the sum of its proper divisors (67377716619).

202120210101 is a wasteful number, since it uses less digits than its factorization.

202120210101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078315.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 202120210101 its reverse (101012021202), we get a palindrome (303132231303).

It can be divided in two parts, 2021202 and 10101, that multiplied together give a palindrome (20416161402).

The spelling of 202120210101 in words is "two hundred two billion, one hundred twenty million, two hundred ten thousand, one hundred one".