1212130312121 has 4 divisors (see below), whose sum is σ = 1213418443044. Its totient is φ = 1210842181200.

The previous prime is 1212130312109. The next prime is 1212130312147.

1212130312121 is nontrivially palindromic in base 10.

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 735416014096 + 476714298025 = 857564^2 + 690445^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212130312121 - 2²² = 1212126117817 is a prime.

It is a super-3 number, since 3×1212130312121³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212130312093 and 1212130312102.

It is not an unprimeable number, because it can be changed into a prime (1212130314121) 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, 644064050 + ... + 644065931.

It is an arithmetic number, because the mean of its divisors is an integer number (303354610761).

Almost surely, 2^{1212130312121} is an apocalyptic number.

It is an amenable number.

1212130312121 is a deficient number, since it is larger than the sum of its proper divisors (1288130923).

1212130312121 is an equidigital number, since it uses as much as digits as its factorization.

1212130312121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288130922.

The product of its (nonzero) digits is 144, while the sum is 20.

It can be divided in two parts, 1212130 and 312121, that added together give a palindrome (1524251).

The spelling of 1212130312121 in words is "one trillion, two hundred twelve billion, one hundred thirty million, three hundred twelve thousand, one hundred twenty-one".