2012220989 has 2 divisors, whose sum is σ = 2012220990. Its totient is φ = 2012220988.

The previous prime is 2012220967. The next prime is 2012221007. The reversal of 2012220989 is 9890222102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1334660089 + 677560900 = 36533^2 + 26030^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012220989 - 2²⁰ = 2011172413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2012220689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006110494 + 1006110495.

It is an arithmetic number, because the mean of its divisors is an integer number (1006110495).

Almost surely, 2^2012220989 is an apocalyptic number.

It is an amenable number.

2012220989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012220989 is an equidigital number, since it uses as much as digits as its factorization.

2012220989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 2012220989 is about 44857.7862694984. The cubic root of 2012220989 is about 1262.4820874366.

The spelling of 2012220989 in words is "two billion, twelve million, two hundred twenty thousand, nine hundred eighty-nine".