221212100130031 has 8 divisors (see below), whose sum is σ = 222829936121520. Its totient is φ = 219594309778368.

The previous prime is 221212100130019. The next prime is 221212100130059. The reversal of 221212100130031 is 130031001212122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221212100130031 - 2²⁷ = 221211965912303 is a prime.

It is a super-2 number, since 2×221212100130031² (a number of 29 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 = 221212100129990 and 221212100130008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221212100130001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1650276 + ... + 21098521.

It is an arithmetic number, because the mean of its divisors is an integer number (27853742015190).

Almost surely, 2^{221212100130031} is an apocalyptic number.

221212100130031 is a deficient number, since it is larger than the sum of its proper divisors (1617835991489).

221212100130031 is a wasteful number, since it uses less digits than its factorization.

221212100130031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22819913.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 221212100130031 its reverse (130031001212122), we get a palindrome (351243101342153).

The spelling of 221212100130031 in words is "two hundred twenty-one trillion, two hundred twelve billion, one hundred million, one hundred thirty thousand, thirty-one".