121577990122 has 4 divisors (see below), whose sum is σ = 182366985186. Its totient is φ = 60788995060.

The previous prime is 121577990113. The next prime is 121577990129. The reversal of 121577990122 is 221099775121.

121577990122 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 81252932401 + 40325057721 = 285049^2 + 200811^2 .

It is not an unprimeable number, because it can be changed into a prime (121577990129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30394497529 + ... + 30394497532.

Almost surely, 2^121577990122 is an apocalyptic number.

121577990122 is a deficient number, since it is larger than the sum of its proper divisors (60788995064).

121577990122 is an equidigital number, since it uses as much as digits as its factorization.

121577990122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60788995063.

The product of its (nonzero) digits is 158760, while the sum is 46.

The spelling of 121577990122 in words is "one hundred twenty-one billion, five hundred seventy-seven million, nine hundred ninety thousand, one hundred twenty-two".