121221211194 has 48 divisors (see below), whose sum is σ = 278150581800. Its totient is φ = 38022681600.

The previous prime is 121221211159. The next prime is 121221211249. The reversal of 121221211194 is 491112122121.

It can be written as a sum of positive squares in 4 ways, for example, as 96811211025 + 24410000169 = 311145^2 + 156237^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1631044 + ... + 1703744.

Almost surely, 2^121221211194 is an apocalyptic number.

121221211194 is an abundant number, since it is smaller than the sum of its proper divisors (156929370606).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121221211194 is a wasteful number, since it uses less digits than its factorization.

121221211194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78175 (or 78172 counting only the distinct ones).

The product of its digits is 576, while the sum is 27.

The spelling of 121221211194 in words is "one hundred twenty-one billion, two hundred twenty-one million, two hundred eleven thousand, one hundred ninety-four".