12021211201021 has 12 divisors (see below), whose sum is σ = 13216239034432. Its totient is φ = 10926023625000.

The previous prime is 12021211201001. The next prime is 12021211201031. The reversal of 12021211201021 is 12010211212021.

It is not a de Polignac number, because 12021211201021 - 2²⁹ = 12020674330109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12021211200986 and 12021211201004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021211201001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10117605 + ... + 11243146.

Almost surely, 2^{12021211201021} is an apocalyptic number.

12021211201021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12021211201021 is a deficient number, since it is larger than the sum of its proper divisors (1195027833411).

12021211201021 is a wasteful number, since it uses less digits than its factorization.

12021211201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21365424 (or 21365413 counting only the distinct ones).

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

Adding to 12021211201021 its reverse (12010211212021), we get a palindrome (24031422413042).

The spelling of 12021211201021 in words is "twelve trillion, twenty-one billion, two hundred eleven million, two hundred one thousand, twenty-one".