121101311544 has 16 divisors (see below), whose sum is σ = 302753278920. Its totient is φ = 40367103840.

The previous prime is 121101311531. The next prime is 121101311549. The reversal of 121101311544 is 445113101121.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 5045887981 = 121101311544 / (1 + 2 + 1 + 1 + 0 + 1 + 3 + 1 + 1 + 5 + 4 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121101311549) 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, 2522943967 + ... + 2522944014.

Almost surely, 2^121101311544 is an apocalyptic number.

It is an amenable number.

121101311544 is an abundant number, since it is smaller than the sum of its proper divisors (181651967376).

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

121101311544 is a wasteful number, since it uses less digits than its factorization.

121101311544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5045887990 (or 5045887986 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 24.

Adding to 121101311544 its reverse (445113101121), we get a palindrome (566214412665).

The spelling of 121101311544 in words is "one hundred twenty-one billion, one hundred one million, three hundred eleven thousand, five hundred forty-four".