31230103120121 has 4 divisors (see below), whose sum is σ = 31266459469200. Its totient is φ = 31193746771044.

The previous prime is 31230103120067. The next prime is 31230103120193. The reversal of 31230103120121 is 12102130103213.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31230103120121 - 2⁶ = 31230103120057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31230103120093 and 31230103120102.

It is not an unprimeable number, because it can be changed into a prime (31230103150121) 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, 18178173251 + ... + 18178174968.

It is an arithmetic number, because the mean of its divisors is an integer number (7816614867300).

Almost surely, 2^{31230103120121} is an apocalyptic number.

It is an amenable number.

31230103120121 is a deficient number, since it is larger than the sum of its proper divisors (36356349079).

31230103120121 is an equidigital number, since it uses as much as digits as its factorization.

31230103120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36356349078.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 31230103120121 its reverse (12102130103213), we get a palindrome (43332233223334).

The spelling of 31230103120121 in words is "thirty-one trillion, two hundred thirty billion, one hundred three million, one hundred twenty thousand, one hundred twenty-one".