12100211221021 has 32 divisors (see below), whose sum is σ = 15881194828800. Its totient is φ = 8931801415680.

The previous prime is 12100211221013. The next prime is 12100211221117. The reversal of 12100211221021 is 12012211200121.

It is not a de Polignac number, because 12100211221021 - 2³ = 12100211221013 is a prime.

It is a super-2 number, since 2×12100211221021² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12100211220986 and 12100211221004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100211221621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19166290 + ... + 19787548.

It is an arithmetic number, because the mean of its divisors is an integer number (496287338400).

Almost surely, 2^{12100211221021} is an apocalyptic number.

12100211221021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12100211221021 is a deficient number, since it is larger than the sum of its proper divisors (3780983607779).

12100211221021 is a wasteful number, since it uses less digits than its factorization.

12100211221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634609.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12100211221021 its reverse (12012211200121), we get a palindrome (24112422421142).

The spelling of 12100211221021 in words is "twelve trillion, one hundred billion, two hundred eleven million, two hundred twenty-one thousand, twenty-one".