121310022121989 has 4 divisors (see below), whose sum is σ = 161746696162656. Its totient is φ = 80873348081324.

The previous prime is 121310022121957. The next prime is 121310022121993. The reversal of 121310022121989 is 989121220013121.

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 121310022121989 - 2⁵ = 121310022121957 is a prime.

It is a super-2 number, since 2×121310022121989² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121310022121989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121310022121789) 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, 20218337020329 + ... + 20218337020334.

It is an arithmetic number, because the mean of its divisors is an integer number (40436674040664).

Almost surely, 2^{121310022121989} is an apocalyptic number.

It is an amenable number.

121310022121989 is a deficient number, since it is larger than the sum of its proper divisors (40436674040667).

121310022121989 is an equidigital number, since it uses as much as digits as its factorization.

121310022121989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40436674040666.

The product of its (nonzero) digits is 31104, while the sum is 42.

The spelling of 121310022121989 in words is "one hundred twenty-one trillion, three hundred ten billion, twenty-two million, one hundred twenty-one thousand, nine hundred eighty-nine".