219122401621 has 8 divisors (see below), whose sum is σ = 219763051200. Its totient is φ = 218482313280.

The previous prime is 219122401591. The next prime is 219122401651. The reversal of 219122401621 is 126104221912.

It is an interprime number because it is at equal distance from previous prime (219122401591) and next prime (219122401651).

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 219122401621 - 2¹⁹ = 219121877333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (219122401651) 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, 648141 + ... + 926461.

It is an arithmetic number, because the mean of its divisors is an integer number (27470381400).

Almost surely, 2^219122401621 is an apocalyptic number.

It is an amenable number.

219122401621 is a deficient number, since it is larger than the sum of its proper divisors (640649579).

219122401621 is a wasteful number, since it uses less digits than its factorization.

219122401621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280619.

The product of its (nonzero) digits is 3456, while the sum is 31.

The spelling of 219122401621 in words is "two hundred nineteen billion, one hundred twenty-two million, four hundred one thousand, six hundred twenty-one".