101225040251 has 4 divisors (see below), whose sum is σ = 102611684712. Its totient is φ = 99838395792.

The previous prime is 101225040239. The next prime is 101225040253. The reversal of 101225040251 is 152040522101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101225040251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101225040253) 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, 693322121 + ... + 693322266.

It is an arithmetic number, because the mean of its divisors is an integer number (25652921178).

Almost surely, 2^101225040251 is an apocalyptic number.

101225040251 is a deficient number, since it is larger than the sum of its proper divisors (1386644461).

101225040251 is an equidigital number, since it uses as much as digits as its factorization.

101225040251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1386644460.

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 101225040251 its reverse (152040522101), we get a palindrome (253265562352).

It can be divided in two parts, 1012250 and 40251, that added together give a palindrome (1052501).

The spelling of 101225040251 in words is "one hundred one billion, two hundred twenty-five million, forty thousand, two hundred fifty-one".