101040090821 has 4 divisors (see below), whose sum is σ = 105433138272. Its totient is φ = 96647043372.

The previous prime is 101040090797. The next prime is 101040090857. The reversal of 101040090821 is 128090040101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 101040090821 - 2⁶ = 101040090757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101040090881) 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, 2196523691 + ... + 2196523736.

It is an arithmetic number, because the mean of its divisors is an integer number (26358284568).

Almost surely, 2^101040090821 is an apocalyptic number.

It is an amenable number.

101040090821 is a deficient number, since it is larger than the sum of its proper divisors (4393047451).

101040090821 is an equidigital number, since it uses as much as digits as its factorization.

101040090821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4393047450.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 101040090821 in words is "one hundred one billion, forty million, ninety thousand, eight hundred twenty-one".