109213619521 has 4 divisors (see below), whose sum is σ = 109238182912. Its totient is φ = 109189056132.

The previous prime is 109213619483. The next prime is 109213619621. The reversal of 109213619521 is 125916312901.

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 109213619521 - 2²³ = 109205230913 is a prime.

It is a super-2 number, since 2×109213619521² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109213619621) 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, 12275025 + ... + 12283918.

It is an arithmetic number, because the mean of its divisors is an integer number (27309545728).

Almost surely, 2^109213619521 is an apocalyptic number.

It is an amenable number.

109213619521 is a deficient number, since it is larger than the sum of its proper divisors (24563391).

109213619521 is an equidigital number, since it uses as much as digits as its factorization.

109213619521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24563390.

The product of its (nonzero) digits is 29160, while the sum is 40.

The spelling of 109213619521 in words is "one hundred nine billion, two hundred thirteen million, six hundred nineteen thousand, five hundred twenty-one".