121221211193 has 4 divisors (see below), whose sum is σ = 127601274960. Its totient is φ = 114841147428.

The previous prime is 121221211159. The next prime is 121221211249. The reversal of 121221211193 is 391112122121.

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 121221211193 - 2⁸ = 121221210937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121221211123) 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, 3190031855 + ... + 3190031892.

It is an arithmetic number, because the mean of its divisors is an integer number (31900318740).

Almost surely, 2^121221211193 is an apocalyptic number.

It is an amenable number.

121221211193 is a deficient number, since it is larger than the sum of its proper divisors (6380063767).

121221211193 is an equidigital number, since it uses as much as digits as its factorization.

121221211193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6380063766.

The product of its digits is 432, while the sum is 26.

The spelling of 121221211193 in words is "one hundred twenty-one billion, two hundred twenty-one million, two hundred eleven thousand, one hundred ninety-three".