12021970001 has 2 divisors, whose sum is σ = 12021970002. Its totient is φ = 12021970000.

The previous prime is 12021969989. The next prime is 12021970003. The reversal of 12021970001 is 10007912021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6589542976 + 5432427025 = 81176^2 + 73705^2 .

It is an emirp because it is prime and its reverse (10007912021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12021970001 - 2⁶ = 12021969937 is a prime.

Together with 12021970003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12021970003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010985000 + 6010985001.

It is an arithmetic number, because the mean of its divisors is an integer number (6010985001).

Almost surely, 2^12021970001 is an apocalyptic number.

It is an amenable number.

12021970001 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021970001 is an equidigital number, since it uses as much as digits as its factorization.

12021970001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 23.

The spelling of 12021970001 in words is "twelve billion, twenty-one million, nine hundred seventy thousand, one".