221310125153401 has 4 divisors (see below), whose sum is σ = 228449161448704. Its totient is φ = 214171088858100.

The previous prime is 221310125153387. The next prime is 221310125153437. The reversal of 221310125153401 is 104351521013122.

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 221310125153401 - 2⁹ = 221310125152889 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 7139036295271 = 221310125153401 / (2 + 2 + 1 + 3 + 1 + 0 + 1 + 2 + 5 + 1 + 5 + 3 + 4 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221310125153461) 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, 3569518147605 + ... + 3569518147666.

It is an arithmetic number, because the mean of its divisors is an integer number (57112290362176).

Almost surely, 2^{221310125153401} is an apocalyptic number.

It is an amenable number.

221310125153401 is a deficient number, since it is larger than the sum of its proper divisors (7139036295303).

221310125153401 is an equidigital number, since it uses as much as digits as its factorization.

221310125153401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7139036295302.

The product of its (nonzero) digits is 7200, while the sum is 31.

Adding to 221310125153401 its reverse (104351521013122), we get a palindrome (325661646166523).

The spelling of 221310125153401 in words is "two hundred twenty-one trillion, three hundred ten billion, one hundred twenty-five million, one hundred fifty-three thousand, four hundred one".