12020220201989 has 2 divisors, whose sum is σ = 12020220201990. Its totient is φ = 12020220201988.

The previous prime is 12020220201961. The next prime is 12020220202063. The reversal of 12020220201989 is 98910202202021.

12020220201989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11042528380900 + 977691821089 = 3323030^2 + 988783^2 .

It is a cyclic number.

It is not a de Polignac number, because 12020220201989 - 2⁸ = 12020220201733 is a prime.

It is a super-2 number, since 2×12020220201989² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12020220201919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010110100994 + 6010110100995.

It is an arithmetic number, because the mean of its divisors is an integer number (6010110100995).

Almost surely, 2^{12020220201989} is an apocalyptic number.

It is an amenable number.

12020220201989 is a deficient number, since it is larger than the sum of its proper divisors (1).

12020220201989 is an equidigital number, since it uses as much as digits as its factorization.

12020220201989 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 12020220201989 in words is "twelve trillion, twenty billion, two hundred twenty million, two hundred one thousand, nine hundred eighty-nine".