12001212020021 has 32 divisors (see below), whose sum is σ = 14101522913280. Its totient is φ = 10002067137216.

The previous prime is 12001212019999. The next prime is 12001212020023. The reversal of 12001212020021 is 12002021210021.

It is not a de Polignac number, because 12001212020021 - 2⁶ = 12001212019957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12001212019978 and 12001212020005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001212020023) 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, 12998510 + ... + 13891136.

It is an arithmetic number, because the mean of its divisors is an integer number (440672591040).

Almost surely, 2^{12001212020021} is an apocalyptic number.

It is an amenable number.

12001212020021 is a deficient number, since it is larger than the sum of its proper divisors (2100310893259).

12001212020021 is a wasteful number, since it uses less digits than its factorization.

12001212020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893073.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12001212020021 its reverse (12002021210021), we get a palindrome (24003233230042).

The spelling of 12001212020021 in words is "twelve trillion, one billion, two hundred twelve million, twenty thousand, twenty-one".