20110220201237 has 2 divisors, whose sum is σ = 20110220201238. Its totient is φ = 20110220201236.

The previous prime is 20110220201213. The next prime is 20110220201243. The reversal of 20110220201237 is 73210202201102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11860405883236 + 8249814318001 = 3443894^2 + 2872249^2 .

It is a cyclic number.

It is not a de Polignac number, because 20110220201237 - 2¹⁸ = 20110219939093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20110220201737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055110100618 + 10055110100619.

It is an arithmetic number, because the mean of its divisors is an integer number (10055110100619).

Almost surely, 2^{20110220201237} is an apocalyptic number.

It is an amenable number.

20110220201237 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110220201237 is an equidigital number, since it uses as much as digits as its factorization.

20110220201237 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 20110220201237 its reverse (73210202201102), we get a palindrome (93320422402339).

The spelling of 20110220201237 in words is "twenty trillion, one hundred ten billion, two hundred twenty million, two hundred one thousand, two hundred thirty-seven".