202120011101 has 4 divisors (see below), whose sum is σ = 202293804192. Its totient is φ = 201946218012.

The previous prime is 202120011053. The next prime is 202120011139. The reversal of 202120011101 is 101110021202.

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 202120011101 - 2¹⁰ = 202120010077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202120011151) 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, 86894801 + ... + 86897126.

It is an arithmetic number, because the mean of its divisors is an integer number (50573451048).

Almost surely, 2^202120011101 is an apocalyptic number.

It is an amenable number.

202120011101 is a deficient number, since it is larger than the sum of its proper divisors (173793091).

202120011101 is a wasteful number, since it uses less digits than its factorization.

202120011101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173793090.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 202120011101 its reverse (101110021202), we get a palindrome (303230032303).

The spelling of 202120011101 in words is "two hundred two billion, one hundred twenty million, eleven thousand, one hundred one".