121503105101 has 32 divisors (see below), whose sum is σ = 145913315328. Its totient is φ = 99016706880.

The previous prime is 121503105079. The next prime is 121503105137. The reversal of 121503105101 is 101501305121.

It is a happy number.

It is not a de Polignac number, because 121503105101 - 2¹⁰ = 121503104077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121503105901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1996046 + ... + 2056016.

It is an arithmetic number, because the mean of its divisors is an integer number (4559791104).

Almost surely, 2^121503105101 is an apocalyptic number.

It is an amenable number.

121503105101 is a deficient number, since it is larger than the sum of its proper divisors (24410210227).

121503105101 is a wasteful number, since it uses less digits than its factorization.

121503105101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60201.

The product of its (nonzero) digits is 150, while the sum is 20.

The spelling of 121503105101 in words is "one hundred twenty-one billion, five hundred three million, one hundred five thousand, one hundred one".