121230212986 has 4 divisors (see below), whose sum is σ = 181845319482. Its totient is φ = 60615106492.

The previous prime is 121230212927. The next prime is 121230212989. The reversal of 121230212986 is 689212032121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 689212032121 = 23 ⋅29965740527.

It can be written as a sum of positive squares in only one way, i.e., 118039657761 + 3190555225 = 343569^2 + 56485^2 .

It is not an unprimeable number, because it can be changed into a prime (121230212989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30307553245 + ... + 30307553248.

Almost surely, 2^121230212986 is an apocalyptic number.

121230212986 is a deficient number, since it is larger than the sum of its proper divisors (60615106496).

121230212986 is an equidigital number, since it uses as much as digits as its factorization.

121230212986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60615106495.

The product of its (nonzero) digits is 20736, while the sum is 37.

The spelling of 121230212986 in words is "one hundred twenty-one billion, two hundred thirty million, two hundred twelve thousand, nine hundred eighty-six".