2101472861 has 2 divisors, whose sum is σ = 2101472862. Its totient is φ = 2101472860.

The previous prime is 2101472851. The next prime is 2101472881. The reversal of 2101472861 is 1682741012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1648847236 + 452625625 = 40606^2 + 21275^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101472861 - 2¹⁰ = 2101471837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101472801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050736430 + 1050736431.

It is an arithmetic number, because the mean of its divisors is an integer number (1050736431).

Almost surely, 2^2101472861 is an apocalyptic number.

It is an amenable number.

2101472861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101472861 is an equidigital number, since it uses as much as digits as its factorization.

2101472861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 2101472861 is about 45841.8243637838. The cubic root of 2101472861 is about 1280.8784783734.

The spelling of 2101472861 in words is "two billion, one hundred one million, four hundred seventy-two thousand, eight hundred sixty-one".