1201000120989 has 4 divisors (see below), whose sum is σ = 1601333494656. Its totient is φ = 800666747324.

The previous prime is 1201000120987. The next prime is 1201000121021. The reversal of 1201000120989 is 9890210001021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1201000120989 - 2¹ = 1201000120987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201000120987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200166686829 + ... + 200166686834.

It is an arithmetic number, because the mean of its divisors is an integer number (400333373664).

Almost surely, 2^{1201000120989} is an apocalyptic number.

It is an amenable number.

1201000120989 is a deficient number, since it is larger than the sum of its proper divisors (400333373667).

1201000120989 is an equidigital number, since it uses as much as digits as its factorization.

1201000120989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400333373666.

The product of its (nonzero) digits is 2592, while the sum is 33.

The spelling of 1201000120989 in words is "one trillion, two hundred one billion, one hundred twenty thousand, nine hundred eighty-nine".