12001210020021 has 64 divisors (see below), whose sum is σ = 16536195099648. Its totient is φ = 7738208944128.

The previous prime is 12001210020001. The next prime is 12001210020029. The reversal of 12001210020021 is 12002001210021.

It is not a de Polignac number, because 12001210020021 - 2¹⁴ = 12001210003637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12001210019979 and 12001210020006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001210020029) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4852894041 + ... + 4852896513.

It is an arithmetic number, because the mean of its divisors is an integer number (258378048432).

Almost surely, 2^{12001210020021} is an apocalyptic number.

It is an amenable number.

12001210020021 is a deficient number, since it is larger than the sum of its proper divisors (4534985079627).

12001210020021 is a wasteful number, since it uses less digits than its factorization.

12001210020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3790.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12001210020021 its reverse (12002001210021), we get a palindrome (24003211230042).

The spelling of 12001210020021 in words is "twelve trillion, one billion, two hundred ten million, twenty thousand, twenty-one".