121220103121 has 64 divisors (see below), whose sum is σ = 139591952640. Its totient is φ = 104510914560.

The previous prime is 121220103101. The next prime is 121220103133. The reversal of 121220103121 is 121301022121.

It is not a de Polignac number, because 121220103121 - 2⁵ = 121220103089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121220103095 and 121220103104.

It is not an unprimeable number, because it can be changed into a prime (121220103101) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 428339446 + ... + 428339728.

It is an arithmetic number, because the mean of its divisors is an integer number (2181124260).

Almost surely, 2^121220103121 is an apocalyptic number.

It is an amenable number.

121220103121 is a deficient number, since it is larger than the sum of its proper divisors (18371849519).

121220103121 is a wasteful number, since it uses less digits than its factorization.

121220103121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 121220103121 its reverse (121301022121), we get a palindrome (242521125242).

The spelling of 121220103121 in words is "one hundred twenty-one billion, two hundred twenty million, one hundred three thousand, one hundred twenty-one".