101231221031 has 4 divisors (see below), whose sum is σ = 101400222000. Its totient is φ = 101062220064.

The previous prime is 101231220973. The next prime is 101231221033. The reversal of 101231221031 is 130122132101.

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

It is a cyclic number.

It is not a de Polignac number, because 101231221031 - 2¹⁴ = 101231204647 is a prime.

It is a super-2 number, since 2×101231221031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101231221033) 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, 84499586 + ... + 84500783.

It is an arithmetic number, because the mean of its divisors is an integer number (25350055500).

Almost surely, 2^101231221031 is an apocalyptic number.

101231221031 is a deficient number, since it is larger than the sum of its proper divisors (169000969).

101231221031 is an equidigital number, since it uses as much as digits as its factorization.

101231221031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169000968.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 101231221031 its reverse (130122132101), we get a palindrome (231353353132).

The spelling of 101231221031 in words is "one hundred one billion, two hundred thirty-one million, two hundred twenty-one thousand, thirty-one".