221214302031 has 4 divisors (see below), whose sum is σ = 294952402712. Its totient is φ = 147476201352.

The previous prime is 221214302011. The next prime is 221214302039. The reversal of 221214302031 is 130203412122.

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

It is a de Polignac number, because none of the positive numbers 2^k-221214302031 is a prime.

It is a super-2 number, since 2×221214302031² (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 = 221214301989 and 221214302007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221214302039) 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, 36869050336 + ... + 36869050341.

It is an arithmetic number, because the mean of its divisors is an integer number (73738100678).

Almost surely, 2^221214302031 is an apocalyptic number.

221214302031 is a deficient number, since it is larger than the sum of its proper divisors (73738100681).

221214302031 is an equidigital number, since it uses as much as digits as its factorization.

221214302031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73738100680.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 221214302031 its reverse (130203412122), we get a palindrome (351417714153).

The spelling of 221214302031 in words is "two hundred twenty-one billion, two hundred fourteen million, three hundred two thousand, thirty-one".