25101210221051 has 4 divisors (see below), whose sum is σ = 25101225697392. Its totient is φ = 25101194744712.

The previous prime is 25101210221047. The next prime is 25101210221083. The reversal of 25101210221051 is 15012201210152.

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 25101210221051 - 2² = 25101210221047 is a prime.

It is a super-2 number, since 2×25101210221051² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25101210221251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4976855 + ... + 8658608.

It is an arithmetic number, because the mean of its divisors is an integer number (6275306424348).

Almost surely, 2^{25101210221051} is an apocalyptic number.

25101210221051 is a deficient number, since it is larger than the sum of its proper divisors (15476341).

25101210221051 is a wasteful number, since it uses less digits than its factorization.

25101210221051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15476340.

The product of its (nonzero) digits is 400, while the sum is 23.

The spelling of 25101210221051 in words is "twenty-five trillion, one hundred one billion, two hundred ten million, two hundred twenty-one thousand, fifty-one".