121220133742044 has 72 divisors (see below), whose sum is σ = 308047960915968. Its totient is φ = 40191749246880.

The previous prime is 121220133742039. The next prime is 121220133742051. The reversal of 121220133742044 is 440247331022121.

121220133742044 is a `hidden beast` number, since 1 + 2 + 1 + 220 + 1 + 3 + 3 + 7 + 420 + 4 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 80993469 + ... + 82476555.

Almost surely, 2^{121220133742044} is an apocalyptic number.

It is an amenable number.

121220133742044 is an abundant number, since it is smaller than the sum of its proper divisors (186827827173924).

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

121220133742044 is a wasteful number, since it uses less digits than its factorization.

121220133742044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495175 (or 1495170 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

Adding to 121220133742044 its reverse (440247331022121), we get a palindrome (561467464764165).

The spelling of 121220133742044 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred thirty-three million, seven hundred forty-two thousand, forty-four".