125121622402 has 12 divisors (see below), whose sum is σ = 218324463750. Its totient is φ = 53623552416.

The previous prime is 125121622391. The next prime is 125121622403. The reversal of 125121622402 is 204226121521.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 85914058321 + 39207564081 = 293111^2 + 198009^2 .

It is not an unprimeable number, because it can be changed into a prime (125121622403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 638375527 + ... + 638375722.

Almost surely, 2^125121622402 is an apocalyptic number.

125121622402 is a deficient number, since it is larger than the sum of its proper divisors (93202841348).

125121622402 is a wasteful number, since it uses less digits than its factorization.

125121622402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276751265 (or 1276751258 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 125121622402 its reverse (204226121521), we get a palindrome (329347743923).

The spelling of 125121622402 in words is "one hundred twenty-five billion, one hundred twenty-one million, six hundred twenty-two thousand, four hundred two".