221012022137 has 2 divisors, whose sum is σ = 221012022138. Its totient is φ = 221012022136.

The previous prime is 221012022031. The next prime is 221012022149. The reversal of 221012022137 is 731220210122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166734205561 + 54277816576 = 408331^2 + 232976^2 .

It is a cyclic number.

It is not a de Polignac number, because 221012022137 - 2¹² = 221012018041 is a prime.

It is not a weakly prime, because it can be changed into another prime (221012024137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110506011068 + 110506011069.

It is an arithmetic number, because the mean of its divisors is an integer number (110506011069).

Almost surely, 2^221012022137 is an apocalyptic number.

It is an amenable number.

221012022137 is a deficient number, since it is larger than the sum of its proper divisors (1).

221012022137 is an equidigital number, since it uses as much as digits as its factorization.

221012022137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 23.

Adding to 221012022137 its reverse (731220210122), we get a palindrome (952232232259).

The spelling of 221012022137 in words is "two hundred twenty-one billion, twelve million, twenty-two thousand, one hundred thirty-seven".