19313012121 has 16 divisors (see below), whose sum is σ = 28626071040. Its totient is φ = 11501544960.

The previous prime is 19313012111. The next prime is 19313012123. The reversal of 19313012121 is 12121031391.

It is not a de Polignac number, because 19313012121 - 2²¹ = 19310914969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19313012091 and 19313012100.

It is not an unprimeable number, because it can be changed into a prime (19313012123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7985976 + ... + 7988393.

It is an arithmetic number, because the mean of its divisors is an integer number (1789129440).

Almost surely, 2^19313012121 is an apocalyptic number.

It is an amenable number.

19313012121 is a deficient number, since it is larger than the sum of its proper divisors (9313058919).

19313012121 is a wasteful number, since it uses less digits than its factorization.

19313012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15974416.

The product of its (nonzero) digits is 324, while the sum is 24.

The spelling of 19313012121 in words is "nineteen billion, three hundred thirteen million, twelve thousand, one hundred twenty-one".