2102011687901 has 2 divisors, whose sum is σ = 2102011687902. Its totient is φ = 2102011687900.

The previous prime is 2102011687883. The next prime is 2102011687913. The reversal of 2102011687901 is 1097861102012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1753320256900 + 348691431001 = 1324130^2 + 590501^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102011687901 - 2³⁴ = 2084831818717 is a prime.

It is a super-2 number, since 2×2102011687901² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2102011687921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051005843950 + 1051005843951.

It is an arithmetic number, because the mean of its divisors is an integer number (1051005843951).

Almost surely, 2^{2102011687901} is an apocalyptic number.

It is an amenable number.

2102011687901 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102011687901 is an equidigital number, since it uses as much as digits as its factorization.

2102011687901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 38.

Adding to 2102011687901 its reverse (1097861102012), we get a palindrome (3199872789913).

The spelling of 2102011687901 in words is "two trillion, one hundred two billion, eleven million, six hundred eighty-seven thousand, nine hundred one".