20210100201257 has 2 divisors, whose sum is σ = 20210100201258. Its totient is φ = 20210100201256.

The previous prime is 20210100201211. The next prime is 20210100201281. The reversal of 20210100201257 is 75210200101202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18986202723856 + 1223897477401 = 4357316^2 + 1106299^2 .

It is a cyclic number.

It is not a de Polignac number, because 20210100201257 - 2²² = 20210096006953 is a prime.

It is not a weakly prime, because it can be changed into another prime (20210100221257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105050100628 + 10105050100629.

It is an arithmetic number, because the mean of its divisors is an integer number (10105050100629).

Almost surely, 2^{20210100201257} is an apocalyptic number.

It is an amenable number.

20210100201257 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210100201257 is an equidigital number, since it uses as much as digits as its factorization.

20210100201257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 23.

Adding to 20210100201257 its reverse (75210200101202), we get a palindrome (95420300302459).

The spelling of 20210100201257 in words is "twenty trillion, two hundred ten billion, one hundred million, two hundred one thousand, two hundred fifty-seven".