2101002061 has 2 divisors, whose sum is σ = 2101002062. Its totient is φ = 2101002060.

The previous prime is 2101002023. The next prime is 2101002143. The reversal of 2101002061 is 1602001012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1571726025 + 529276036 = 39645^2 + 23006^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101002061 - 2¹⁹ = 2100477773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101002011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050501030 + 1050501031.

It is an arithmetic number, because the mean of its divisors is an integer number (1050501031).

Almost surely, 2^2101002061 is an apocalyptic number.

It is an amenable number.

2101002061 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101002061 is an equidigital number, since it uses as much as digits as its factorization.

2101002061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2101002061 is about 45836.6890274592. The cubic root of 2101002061 is about 1280.7828180649.

Adding to 2101002061 its reverse (1602001012), we get a palindrome (3703003073).

The spelling of 2101002061 in words is "two billion, one hundred one million, two thousand, sixty-one".