101240442221 has 4 divisors (see below), whose sum is σ = 102136375452. Its totient is φ = 100344508992.

The previous prime is 101240442209. The next prime is 101240442283. The reversal of 101240442221 is 122244042101.

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 10150562500 + 91089879721 = 100750^2 + 301811^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101240442221 is a prime.

It is a super-2 number, since 2×101240442221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101240445221) 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, 447966446 + ... + 447966671.

It is an arithmetic number, because the mean of its divisors is an integer number (25534093863).

Almost surely, 2^101240442221 is an apocalyptic number.

It is an amenable number.

101240442221 is a deficient number, since it is larger than the sum of its proper divisors (895933231).

101240442221 is an equidigital number, since it uses as much as digits as its factorization.

101240442221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895933230.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 101240442221 its reverse (122244042101), we get a palindrome (223484484322).

The spelling of 101240442221 in words is "one hundred one billion, two hundred forty million, four hundred forty-two thousand, two hundred twenty-one".