12211220120021 has 32 divisors (see below), whose sum is σ = 13554808565760. Its totient is φ = 10930259710656.

The previous prime is 12211220119933. The next prime is 12211220120041. The reversal of 12211220120021 is 12002102211221.

It is not a de Polignac number, because 12211220120021 - 2¹⁴ = 12211220103637 is a prime.

It is a super-2 number, since 2×12211220120021² (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 (12211220120041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31130450 + ... + 31520268.

It is an arithmetic number, because the mean of its divisors is an integer number (423587767680).

Almost surely, 2^{12211220120021} is an apocalyptic number.

It is an amenable number.

12211220120021 is a deficient number, since it is larger than the sum of its proper divisors (1343588445739).

12211220120021 is a wasteful number, since it uses less digits than its factorization.

12211220120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390353.

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

Adding to 12211220120021 its reverse (12002102211221), we get a palindrome (24213322331242).

The spelling of 12211220120021 in words is "twelve trillion, two hundred eleven billion, two hundred twenty million, one hundred twenty thousand, twenty-one".