202011110021 has 16 divisors (see below), whose sum is σ = 235099238400. Its totient is φ = 169988240688.

The previous prime is 202011110003. The next prime is 202011110033. The reversal of 202011110021 is 120011110202.

It is a de Polignac number, because none of the positive numbers 2^k-202011110021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202011109984 and 202011110011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202011115021) 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, 22301 + ... + 636018.

It is an arithmetic number, because the mean of its divisors is an integer number (14693702400).

Almost surely, 2^202011110021 is an apocalyptic number.

It is an amenable number.

202011110021 is a deficient number, since it is larger than the sum of its proper divisors (33088128379).

202011110021 is an equidigital number, since it uses as much as digits as its factorization.

202011110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659128.

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

Adding to 202011110021 its reverse (120011110202), we get a palindrome (322022220223).

The spelling of 202011110021 in words is "two hundred two billion, eleven million, one hundred ten thousand, twenty-one".