100902691062821 has 4 divisors (see below), whose sum is σ = 100913886311052. Its totient is φ = 100891495814592.

The previous prime is 100902691062773. The next prime is 100902691062889. The reversal of 100902691062821 is 128260196209001.

It is a happy number.

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 67137457125025 + 33765233937796 = 8193745^2 + 5810786^2 .

It is a cyclic number.

It is not a de Polignac number, because 100902691062821 - 2¹⁸ = 100902690800677 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 (100902691065821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5597610596 + ... + 5597628621.

It is an arithmetic number, because the mean of its divisors is an integer number (25228471577763).

Almost surely, 2^{100902691062821} is an apocalyptic number.

It is an amenable number.

100902691062821 is a deficient number, since it is larger than the sum of its proper divisors (11195248231).

100902691062821 is an equidigital number, since it uses as much as digits as its factorization.

100902691062821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11195248230.

The product of its (nonzero) digits is 186624, while the sum is 47.

The spelling of 100902691062821 in words is "one hundred trillion, nine hundred two billion, six hundred ninety-one million, sixty-two thousand, eight hundred twenty-one".