202021012011111 has 16 divisors (see below), whose sum is σ = 270314636427264. Its totient is φ = 134204036347584.

The previous prime is 202021012011109. The next prime is 202021012011131. The reversal of 202021012011111 is 111110210120202.

It is a happy number.

It is not a de Polignac number, because 202021012011111 - 2¹ = 202021012011109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202021012011131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185938635 + ... + 187021971.

It is an arithmetic number, because the mean of its divisors is an integer number (16894664776704).

Almost surely, 2^{202021012011111} is an apocalyptic number.

202021012011111 is a deficient number, since it is larger than the sum of its proper divisors (68293624416153).

202021012011111 is a wasteful number, since it uses less digits than its factorization.

202021012011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303270.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 202021012011111 its reverse (111110210120202), we get a palindrome (313131222131313).

The spelling of 202021012011111 in words is "two hundred two trillion, twenty-one billion, twelve million, eleven thousand, one hundred eleven".