125533230421 has 4 divisors (see below), whose sum is σ = 125536824000. Its totient is φ = 125529636844.

The previous prime is 125533230419. The next prime is 125533230439. The reversal of 125533230421 is 124032335521.

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 125533230421 - 2¹ = 125533230419 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 (125533230521) 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, 1743871 + ... + 1814428.

It is an arithmetic number, because the mean of its divisors is an integer number (31384206000).

Almost surely, 2^125533230421 is an apocalyptic number.

It is an amenable number.

125533230421 is a deficient number, since it is larger than the sum of its proper divisors (3593579).

125533230421 is an equidigital number, since it uses as much as digits as its factorization.

125533230421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3593578.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 125533230421 its reverse (124032335521), we get a palindrome (249565565942).

The spelling of 125533230421 in words is "one hundred twenty-five billion, five hundred thirty-three million, two hundred thirty thousand, four hundred twenty-one".