20102221001237 has 2 divisors, whose sum is σ = 20102221001238. Its totient is φ = 20102221001236.

The previous prime is 20102221001183. The next prime is 20102221001257. The reversal of 20102221001237 is 73210012220102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12279985326961 + 7822235674276 = 3504281^2 + 2796826^2 .

It is a cyclic number.

It is not a de Polignac number, because 20102221001237 - 2²² = 20102216806933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20102221001257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051110500618 + 10051110500619.

It is an arithmetic number, because the mean of its divisors is an integer number (10051110500619).

Almost surely, 2^{20102221001237} is an apocalyptic number.

It is an amenable number.

20102221001237 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102221001237 is an equidigital number, since it uses as much as digits as its factorization.

20102221001237 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 20102221001237 its reverse (73210012220102), we get a palindrome (93312233221339).

The spelling of 20102221001237 in words is "twenty trillion, one hundred two billion, two hundred twenty-one million, one thousand, two hundred thirty-seven".