22131210285637 has 2 divisors, whose sum is σ = 22131210285638. Its totient is φ = 22131210285636.

The previous prime is 22131210285619. The next prime is 22131210285659. The reversal of 22131210285637 is 73658201213122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17016235505476 + 5114974780161 = 4125074^2 + 2261631^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22131210285637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22131210285593 and 22131210285602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22131270285637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11065605142818 + 11065605142819.

It is an arithmetic number, because the mean of its divisors is an integer number (11065605142819).

Almost surely, 2^{22131210285637} is an apocalyptic number.

It is an amenable number.

22131210285637 is a deficient number, since it is larger than the sum of its proper divisors (1).

22131210285637 is an equidigital number, since it uses as much as digits as its factorization.

22131210285637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 43.

Adding to 22131210285637 its reverse (73658201213122), we get a palindrome (95789411498759).

The spelling of 22131210285637 in words is "twenty-two trillion, one hundred thirty-one billion, two hundred ten million, two hundred eighty-five thousand, six hundred thirty-seven".