2101931201 has 2 divisors, whose sum is σ = 2101931202. Its totient is φ = 2101931200.

The previous prime is 2101931141. The next prime is 2101931309. The reversal of 2101931201 is 1021391012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1507302976 + 594628225 = 38824^2 + 24385^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101931201 - 2⁶ = 2101931137 is a prime.

It is a super-2 number, since 2×2101931201² = 8836229547474604802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2101931501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050965600 + 1050965601.

It is an arithmetic number, because the mean of its divisors is an integer number (1050965601).

Almost surely, 2^2101931201 is an apocalyptic number.

It is an amenable number.

2101931201 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101931201 is an equidigital number, since it uses as much as digits as its factorization.

2101931201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 2101931201 is about 45846.8232378210. The cubic root of 2101931201 is about 1280.9715932511.

The spelling of 2101931201 in words is "two billion, one hundred one million, nine hundred thirty-one thousand, two hundred one".