201000100010981 has 2 divisors, whose sum is σ = 201000100010982. Its totient is φ = 201000100010980.

The previous prime is 201000100010923. The next prime is 201000100010987. The reversal of 201000100010981 is 189010001000102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 153466879830625 + 47533220180356 = 12388175^2 + 6894434^2 .

It is a cyclic number.

It is not a de Polignac number, because 201000100010981 - 2¹⁴ = 201000099994597 is a prime.

It is a super-2 number, since 2×201000100010981² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201000100010987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100500050005490 + 100500050005491.

It is an arithmetic number, because the mean of its divisors is an integer number (100500050005491).

Almost surely, 2^{201000100010981} is an apocalyptic number.

It is an amenable number.

201000100010981 is a deficient number, since it is larger than the sum of its proper divisors (1).

201000100010981 is an equidigital number, since it uses as much as digits as its factorization.

201000100010981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 201000100010981 in words is "two hundred one trillion, one hundred million, ten thousand, nine hundred eighty-one".