1220102220989 has 2 divisors, whose sum is σ = 1220102220990. Its totient is φ = 1220102220988.

The previous prime is 1220102220923. The next prime is 1220102221007. The reversal of 1220102220989 is 9890222010221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 654372598489 + 565729622500 = 808933^2 + 752150^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220102220989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220102220089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610051110494 + 610051110495.

It is an arithmetic number, because the mean of its divisors is an integer number (610051110495).

Almost surely, 2^{1220102220989} is an apocalyptic number.

It is an amenable number.

1220102220989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220102220989 is an equidigital number, since it uses as much as digits as its factorization.

1220102220989 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 1220102220989 in words is "one trillion, two hundred twenty billion, one hundred two million, two hundred twenty thousand, nine hundred eighty-nine".