22402132431221 has 4 divisors (see below), whose sum is σ = 22402149474432. Its totient is φ = 22402115388012.

The previous prime is 22402132431199. The next prime is 22402132431227. The reversal of 22402132431221 is 12213423120422.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22402132431221 is a prime.

It is a super-3 number, since 3×22402132431221³ (a number of 41 digits) contains 333 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 (22402132431227) 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, 6368645 + ... + 9239258.

It is an arithmetic number, because the mean of its divisors is an integer number (5600537368608).

Almost surely, 2^{22402132431221} is an apocalyptic number.

It is an amenable number.

22402132431221 is a deficient number, since it is larger than the sum of its proper divisors (17043211).

22402132431221 is a wasteful number, since it uses less digits than its factorization.

22402132431221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17043210.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 22402132431221 its reverse (12213423120422), we get a palindrome (34615555551643).

The spelling of 22402132431221 in words is "twenty-two trillion, four hundred two billion, one hundred thirty-two million, four hundred thirty-one thousand, two hundred twenty-one".