11201220122021 has 16 divisors (see below), whose sum is σ = 12078552245760. Its totient is φ = 10352676625920.

The previous prime is 11201220121969. The next prime is 11201220122041. The reversal of 11201220122021 is 12022102210211.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11201220122021 is a prime.

It is a super-2 number, since 2×11201220122021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201220122041) 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, 64989260 + ... + 65161386.

It is an arithmetic number, because the mean of its divisors is an integer number (754909515360).

Almost surely, 2^{11201220122021} is an apocalyptic number.

It is an amenable number.

11201220122021 is a deficient number, since it is larger than the sum of its proper divisors (877332123739).

11201220122021 is a wasteful number, since it uses less digits than its factorization.

11201220122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255724.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 11201220122021 its reverse (12022102210211), we get a palindrome (23223322332232).

The spelling of 11201220122021 in words is "eleven trillion, two hundred one billion, two hundred twenty million, one hundred twenty-two thousand, twenty-one".