103121213121 has 48 divisors (see below), whose sum is σ = 161835822720. Its totient is φ = 63021288960.

The previous prime is 103121213101. The next prime is 103121213131. The reversal of 103121213121 is 121312121301.

It is not a de Polignac number, because 103121213121 - 2¹¹ = 103121211073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 103121213094 and 103121213103.

It is not an unprimeable number, because it can be changed into a prime (103121213101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2340031 + ... + 2383691.

It is an arithmetic number, because the mean of its divisors is an integer number (3371579640).

Almost surely, 2^103121213121 is an apocalyptic number.

It is an amenable number.

103121213121 is a deficient number, since it is larger than the sum of its proper divisors (58714609599).

103121213121 is a wasteful number, since it uses less digits than its factorization.

103121213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44086 (or 44083 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 103121213121 its reverse (121312121301), we get a palindrome (224433334422).

The spelling of 103121213121 in words is "one hundred three billion, one hundred twenty-one million, two hundred thirteen thousand, one hundred twenty-one".