12210020001021 has 16 divisors (see below), whose sum is σ = 17573641983360. Its totient is φ = 7517613512640.

The previous prime is 12210020001017. The next prime is 12210020001043. The reversal of 12210020001021 is 12010002001221.

It is not a de Polignac number, because 12210020001021 - 2² = 12210020001017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12210020000988 and 12210020001006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210020006021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3050977510 + ... + 3050981511.

It is an arithmetic number, because the mean of its divisors is an integer number (1098352623960).

Almost surely, 2^{12210020001021} is an apocalyptic number.

It is an amenable number.

12210020001021 is a deficient number, since it is larger than the sum of its proper divisors (5363621982339).

12210020001021 is a wasteful number, since it uses less digits than its factorization.

12210020001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6101959076.

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

Adding to 12210020001021 its reverse (12010002001221), we get a palindrome (24220022002242).

The spelling of 12210020001021 in words is "twelve trillion, two hundred ten billion, twenty million, one thousand, twenty-one".