2101986001 has 2 divisors, whose sum is σ = 2101986002. Its totient is φ = 2101986000.

The previous prime is 2101985983. The next prime is 2101986011. The reversal of 2101986001 is 1006891012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1590095376 + 511890625 = 39876^2 + 22625^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101986001 - 2⁹ = 2101985489 is a prime.

It is not a weakly prime, because it can be changed into another prime (2101986011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050993000 + 1050993001.

It is an arithmetic number, because the mean of its divisors is an integer number (1050993001).

Almost surely, 2^2101986001 is an apocalyptic number.

It is an amenable number.

2101986001 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101986001 is an equidigital number, since it uses as much as digits as its factorization.

2101986001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 2101986001 is about 45847.4208762063. The cubic root of 2101986001 is about 1280.9827253366.

The spelling of 2101986001 in words is "two billion, one hundred one million, nine hundred eighty-six thousand, one".