2101021049 has 2 divisors, whose sum is σ = 2101021050. Its totient is φ = 2101021048.

The previous prime is 2101021033. The next prime is 2101021073. The reversal of 2101021049 is 9401201012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1578075625 + 522945424 = 39725^2 + 22868^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101021049 - 2⁴ = 2101021033 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2101021049.

It is not a weakly prime, because it can be changed into another prime (2101021009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050510524 + 1050510525.

It is an arithmetic number, because the mean of its divisors is an integer number (1050510525).

Almost surely, 2^2101021049 is an apocalyptic number.

It is an amenable number.

2101021049 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101021049 is an equidigital number, since it uses as much as digits as its factorization.

2101021049 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 20.

The square root of 2101021049 is about 45836.8961536446. The cubic root of 2101021049 is about 1280.7866764509.

The spelling of 2101021049 in words is "two billion, one hundred one million, twenty-one thousand, forty-nine".