1202021000689 has 2 divisors, whose sum is σ = 1202021000690. Its totient is φ = 1202021000688.

The previous prime is 1202021000683. The next prime is 1202021000693. The reversal of 1202021000689 is 9860001202021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1191573094464 + 10447906225 = 1091592^2 + 102215^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202021000689 - 2⁵ = 1202021000657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1202021000689.

It is not a weakly prime, because it can be changed into another prime (1202021000683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601010500344 + 601010500345.

It is an arithmetic number, because the mean of its divisors is an integer number (601010500345).

Almost surely, 2^{1202021000689} is an apocalyptic number.

It is an amenable number.

1202021000689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202021000689 is an equidigital number, since it uses as much as digits as its factorization.

1202021000689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 31.

The spelling of 1202021000689 in words is "one trillion, two hundred two billion, twenty-one million, six hundred eighty-nine", and thus it is an aban number.