202120100012111 has 4 divisors (see below), whose sum is σ = 202139660663112. Its totient is φ = 202100539361112.

The previous prime is 202120100011981. The next prime is 202120100012227. The reversal of 202120100012111 is 111210001021202.

202120100012111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202120100012111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202120000012111) 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, 9780310001 + ... + 9780330666.

It is an arithmetic number, because the mean of its divisors is an integer number (50534915165778).

Almost surely, 2^{202120100012111} is an apocalyptic number.

202120100012111 is a deficient number, since it is larger than the sum of its proper divisors (19560651001).

202120100012111 is a wasteful number, since it uses less digits than its factorization.

202120100012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19560651000.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 202120100012111 its reverse (111210001021202), we get a palindrome (313330101033313).

The spelling of 202120100012111 in words is "two hundred two trillion, one hundred twenty billion, one hundred million, twelve thousand, one hundred eleven".