20210021122011 has 16 divisors (see below), whose sum is σ = 32607765172224. Its totient is φ = 10869255057024.

The previous prime is 20210021121947. The next prime is 20210021122051. The reversal of 20210021122011 is 11022112001202.

It is not a de Polignac number, because 20210021122011 - 2⁶ = 20210021121947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20210021122051) 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, 28305351355 + ... + 28305352068.

It is an arithmetic number, because the mean of its divisors is an integer number (2037985323264).

Almost surely, 2^{20210021122011} is an apocalyptic number.

20210021122011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20210021122011 is a deficient number, since it is larger than the sum of its proper divisors (12397744050213).

20210021122011 is a wasteful number, since it uses less digits than its factorization.

20210021122011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56610703450.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20210021122011 its reverse (11022112001202), we get a palindrome (31232133123213).

The spelling of 20210021122011 in words is "twenty trillion, two hundred ten billion, twenty-one million, one hundred twenty-two thousand, eleven".