125221353263 has 4 divisors (see below), whose sum is σ = 128605714200. Its totient is φ = 121836992328.

The previous prime is 125221353253. The next prime is 125221353277. The reversal of 125221353263 is 362353122521.

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 125221353263 - 2¹⁰ = 125221352239 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 (125221353253) 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, 1692180413 + ... + 1692180486.

It is an arithmetic number, because the mean of its divisors is an integer number (32151428550).

Almost surely, 2^125221353263 is an apocalyptic number.

125221353263 is a deficient number, since it is larger than the sum of its proper divisors (3384360937).

125221353263 is an equidigital number, since it uses as much as digits as its factorization.

125221353263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3384360936.

The product of its digits is 64800, while the sum is 35.

Adding to 125221353263 its reverse (362353122521), we get a palindrome (487574475784).

The spelling of 125221353263 in words is "one hundred twenty-five billion, two hundred twenty-one million, three hundred fifty-three thousand, two hundred sixty-three".