22012312031221 has 8 divisors (see below), whose sum is σ = 22018485266624. Its totient is φ = 22006139352480.

The previous prime is 22012312031183. The next prime is 22012312031249. The reversal of 22012312031221 is 12213021321022.

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 22012312031221 - 2²⁵ = 22012278476789 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22012312031192 and 22012312031201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012312031821) 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, 86396800 + ... + 86651206.

It is an arithmetic number, because the mean of its divisors is an integer number (2752310658328).

Almost surely, 2^{22012312031221} is an apocalyptic number.

It is an amenable number.

22012312031221 is a deficient number, since it is larger than the sum of its proper divisors (6173235403).

22012312031221 is a wasteful number, since it uses less digits than its factorization.

22012312031221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278331.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 22012312031221 its reverse (12213021321022), we get a palindrome (34225333352243).

The spelling of 22012312031221 in words is "twenty-two trillion, twelve billion, three hundred twelve million, thirty-one thousand, two hundred twenty-one".