101825251921 has 4 divisors (see below), whose sum is σ = 101884010292. Its totient is φ = 101766493552.

The previous prime is 101825251903. The next prime is 101825251933. The reversal of 101825251921 is 129152528101.

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

It can be written as a sum of positive squares in 2 ways, for example, as 56091290896 + 45733961025 = 236836^2 + 213855^2 .

It is a cyclic number.

It is not a de Polignac number, because 101825251921 - 2¹¹ = 101825249873 is a prime.

It is a super-2 number, since 2×101825251921² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101825251721) 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, 29376586 + ... + 29380051.

It is an arithmetic number, because the mean of its divisors is an integer number (25471002573).

Almost surely, 2^101825251921 is an apocalyptic number.

It is an amenable number.

101825251921 is a deficient number, since it is larger than the sum of its proper divisors (58758371).

101825251921 is an equidigital number, since it uses as much as digits as its factorization.

101825251921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58758370.

The product of its (nonzero) digits is 14400, while the sum is 37.

The spelling of 101825251921 in words is "one hundred one billion, eight hundred twenty-five million, two hundred fifty-one thousand, nine hundred twenty-one".