1969372612921 has 4 divisors (see below), whose sum is σ = 2250711557632. Its totient is φ = 1688033668212.

The previous prime is 1969372612891. The next prime is 1969372612927. The reversal of 1969372612921 is 1292162739691.

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 1969372612921 - 2⁹ = 1969372612409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1969372612927) 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 3 ways as a sum of consecutive naturals, for example, 140669472345 + ... + 140669472358.

It is an arithmetic number, because the mean of its divisors is an integer number (562677889408).

Almost surely, 2^{1969372612921} is an apocalyptic number.

It is an amenable number.

1969372612921 is a deficient number, since it is larger than the sum of its proper divisors (281338944711).

1969372612921 is an equidigital number, since it uses as much as digits as its factorization.

1969372612921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281338944710.

The product of its digits is 4408992, while the sum is 58.

The spelling of 1969372612921 in words is "one trillion, nine hundred sixty-nine billion, three hundred seventy-two million, six hundred twelve thousand, nine hundred twenty-one".