921221080619 has 8 divisors (see below), whose sum is σ = 1072688698080. Its totient is φ = 774719614656.

The previous prime is 921221080613. The next prime is 921221080621. The reversal of 921221080619 is 916080122129.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 921221080619 - 2²⁸ = 920952645163 is a prime.

It is a super-2 number, since 2×921221080619² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (921221080613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1241537474 + ... + 1241538215.

It is an arithmetic number, because the mean of its divisors is an integer number (134086087260).

Almost surely, 2^921221080619 is an apocalyptic number.

921221080619 is a deficient number, since it is larger than the sum of its proper divisors (151467617461).

921221080619 is a wasteful number, since it uses less digits than its factorization.

921221080619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2483075749.

The product of its (nonzero) digits is 31104, while the sum is 41.

The spelling of 921221080619 in words is "nine hundred twenty-one billion, two hundred twenty-one million, eighty thousand, six hundred nineteen".