21220102022137 has 2 divisors, whose sum is σ = 21220102022138. Its totient is φ = 21220102022136.

The previous prime is 21220102022113. The next prime is 21220102022149. The reversal of 21220102022137 is 73122020102212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16345032324201 + 4875069697936 = 4042899^2 + 2207956^2 .

It is a cyclic number.

It is not a de Polignac number, because 21220102022137 - 2⁴³ = 12424008999929 is a prime.

It is not a weakly prime, because it can be changed into another prime (21220102022167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610051011068 + 10610051011069.

It is an arithmetic number, because the mean of its divisors is an integer number (10610051011069).

Almost surely, 2^{21220102022137} is an apocalyptic number.

It is an amenable number.

21220102022137 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220102022137 is an equidigital number, since it uses as much as digits as its factorization.

21220102022137 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 21220102022137 its reverse (73122020102212), we get a palindrome (94342122124349).

The spelling of 21220102022137 in words is "twenty-one trillion, two hundred twenty billion, one hundred two million, twenty-two thousand, one hundred thirty-seven".