202111000101 has 24 divisors (see below), whose sum is σ = 308804124096. Its totient is φ = 127116855360.

The previous prime is 202111000079. The next prime is 202111000123. The reversal of 202111000101 is 101000111202.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (202111000079) and next prime (202111000123).

It is not a de Polignac number, because 202111000101 - 2⁷ = 202110999973 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 (202111020101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6672435 + ... + 6702656.

It is an arithmetic number, because the mean of its divisors is an integer number (12866838504).

Almost surely, 2^202111000101 is an apocalyptic number.

It is an amenable number.

202111000101 is a deficient number, since it is larger than the sum of its proper divisors (106693123995).

202111000101 is a wasteful number, since it uses less digits than its factorization.

202111000101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13375193 (or 13375190 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 202111000101 its reverse (101000111202), we get a palindrome (303111111303).

The spelling of 202111000101 in words is "two hundred two billion, one hundred eleven million, one hundred one", and thus it is an aban number.