100310231221 has 4 divisors (see below), whose sum is σ = 100311881344. Its totient is φ = 100308581100.

The previous prime is 100310231209. The next prime is 100310231237. The reversal of 100310231221 is 122132013001.

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, and also an emirpimes, since its reverse is a distinct semiprime: 122132013001 = 89 ⋅1372269809.

It is a cyclic number.

It is not a de Polignac number, because 100310231221 - 2¹⁹ = 100309706933 is a prime.

It is a super-2 number, since 2×100310231221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100310231195 and 100310231204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100310241221) 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, 730245 + ... + 856666.

It is an arithmetic number, because the mean of its divisors is an integer number (25077970336).

Almost surely, 2^100310231221 is an apocalyptic number.

It is an amenable number.

100310231221 is a deficient number, since it is larger than the sum of its proper divisors (1650123).

100310231221 is an equidigital number, since it uses as much as digits as its factorization.

100310231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650122.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 100310231221 its reverse (122132013001), we get a palindrome (222442244222).

The spelling of 100310231221 in words is "one hundred billion, three hundred ten million, two hundred thirty-one thousand, two hundred twenty-one".