121010312212109 has 4 divisors (see below), whose sum is σ = 121010361205116. Its totient is φ = 121010263219104.

The previous prime is 121010312212099. The next prime is 121010312212123. The reversal of 121010312212109 is 901212213010121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3309033855625 + 117701278356484 = 1819075^2 + 10849022^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121010312212109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121010312212199) 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, 20583194 + ... + 25800939.

It is an arithmetic number, because the mean of its divisors is an integer number (30252590301279).

Almost surely, 2^{121010312212109} is an apocalyptic number.

It is an amenable number.

121010312212109 is a deficient number, since it is larger than the sum of its proper divisors (48993007).

121010312212109 is an equidigital number, since it uses as much as digits as its factorization.

121010312212109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48993006.

The product of its (nonzero) digits is 432, while the sum is 26.

The spelling of 121010312212109 in words is "one hundred twenty-one trillion, ten billion, three hundred twelve million, two hundred twelve thousand, one hundred nine".