12355051621 has 8 divisors (see below), whose sum is σ = 13481784288. Its totient is φ = 11228910000.

The previous prime is 12355051619. The next prime is 12355051649. The reversal of 12355051621 is 12615055321.

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

It is not a de Polignac number, because 12355051621 - 2¹ = 12355051619 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 (12355051651) 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, 103470 + ... + 188191.

It is an arithmetic number, because the mean of its divisors is an integer number (1685223036).

Almost surely, 2^12355051621 is an apocalyptic number.

12355051621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12355051621 is a deficient number, since it is larger than the sum of its proper divisors (1126732667).

12355051621 is a wasteful number, since it uses less digits than its factorization.

12355051621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295523.

The product of its (nonzero) digits is 9000, while the sum is 31.

The spelling of 12355051621 in words is "twelve billion, three hundred fifty-five million, fifty-one thousand, six hundred twenty-one".