12212001122021 has 32 divisors (see below), whose sum is σ = 13093818433920. Its totient is φ = 11355417216000.

The previous prime is 12212001122011. The next prime is 12212001122051. The reversal of 12212001122021 is 12022110021221.

It is a cyclic number.

It is not a de Polignac number, because 12212001122021 - 2¹⁴ = 12212001105637 is a prime.

It is a super-2 number, since 2×12212001122021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212001122011) 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, 398587715 + ... + 398618351.

It is an arithmetic number, because the mean of its divisors is an integer number (409181826060).

Almost surely, 2^{12212001122021} is an apocalyptic number.

It is an amenable number.

12212001122021 is a deficient number, since it is larger than the sum of its proper divisors (881817311899).

12212001122021 is a wasteful number, since it uses less digits than its factorization.

12212001122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31845.

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

Adding to 12212001122021 its reverse (12022110021221), we get a palindrome (24234111143242).

The spelling of 12212001122021 in words is "twelve trillion, two hundred twelve billion, one million, one hundred twenty-two thousand, twenty-one".