125404221221331 has 16 divisors (see below), whose sum is σ = 180078605177856. Its totient is φ = 77167111811616.

The previous prime is 125404221221297. The next prime is 125404221221333. The reversal of 125404221221331 is 133122122404521.

It is not a de Polignac number, because 125404221221331 - 2²² = 125404217027027 is a prime.

It is a super-2 number, since 2×125404221221331² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 125404221221292 and 125404221221301.

It is not an unprimeable number, because it can be changed into a prime (125404221221333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97616835 + ... + 98893148.

It is an arithmetic number, because the mean of its divisors is an integer number (11254912823616).

Almost surely, 2^{125404221221331} is an apocalyptic number.

125404221221331 is a deficient number, since it is larger than the sum of its proper divisors (54674383956525).

125404221221331 is a wasteful number, since it uses less digits than its factorization.

125404221221331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196526362.

The product of its (nonzero) digits is 23040, while the sum is 33.

Adding to 125404221221331 its reverse (133122122404521), we get a palindrome (258526343625852).

The spelling of 125404221221331 in words is "one hundred twenty-five trillion, four hundred four billion, two hundred twenty-one million, two hundred twenty-one thousand, three hundred thirty-one".