21012102022237 has 2 divisors, whose sum is σ = 21012102022238. Its totient is φ = 21012102022236.

The previous prime is 21012102022201. The next prime is 21012102022259. The reversal of 21012102022237 is 73222020121012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13069591505721 + 7942510516516 = 3615189^2 + 2818246^2 .

It is a cyclic number.

It is not a de Polignac number, because 21012102022237 - 2¹⁹ = 21012101497949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21012102022837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506051011118 + 10506051011119.

It is an arithmetic number, because the mean of its divisors is an integer number (10506051011119).

Almost surely, 2^{21012102022237} is an apocalyptic number.

It is an amenable number.

21012102022237 is a deficient number, since it is larger than the sum of its proper divisors (1).

21012102022237 is an equidigital number, since it uses as much as digits as its factorization.

21012102022237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

Adding to 21012102022237 its reverse (73222020121012), we get a palindrome (94234122143249).

The spelling of 21012102022237 in words is "twenty-one trillion, twelve billion, one hundred two million, twenty-two thousand, two hundred thirty-seven".