22021202001989 has 2 divisors, whose sum is σ = 22021202001990. Its totient is φ = 22021202001988.

The previous prime is 22021202001949. The next prime is 22021202002021. The reversal of 22021202001989 is 98910020212022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12926484096964 + 9094717905025 = 3595342^2 + 3015745^2 .

It is a cyclic number.

It is not a de Polignac number, because 22021202001989 - 2²⁰ = 22021200953413 is a prime.

It is a super-2 number, since 2×22021202001989² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22021202001949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11010601000994 + 11010601000995.

It is an arithmetic number, because the mean of its divisors is an integer number (11010601000995).

Almost surely, 2^{22021202001989} is an apocalyptic number.

It is an amenable number.

22021202001989 is a deficient number, since it is larger than the sum of its proper divisors (1).

22021202001989 is an equidigital number, since it uses as much as digits as its factorization.

22021202001989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 38.

The spelling of 22021202001989 in words is "twenty-two trillion, twenty-one billion, two hundred two million, one thousand, nine hundred eighty-nine".