12221572642351 has 4 divisors (see below), whose sum is σ = 12376276093600. Its totient is φ = 12066869191104.

The previous prime is 12221572642337. The next prime is 12221572642361. The reversal of 12221572642351 is 15324627512221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12221572642351 - 2⁴¹ = 10022549386799 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12221572642298 and 12221572642307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221572642361) 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, 77351725506 + ... + 77351725663.

It is an arithmetic number, because the mean of its divisors is an integer number (3094069023400).

Almost surely, 2^{12221572642351} is an apocalyptic number.

12221572642351 is a deficient number, since it is larger than the sum of its proper divisors (154703451249).

12221572642351 is an equidigital number, since it uses as much as digits as its factorization.

12221572642351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154703451248.

The product of its digits is 403200, while the sum is 43.

The spelling of 12221572642351 in words is "twelve trillion, two hundred twenty-one billion, five hundred seventy-two million, six hundred forty-two thousand, three hundred fifty-one".