2115651101 has 2 divisors, whose sum is σ = 2115651102. Its totient is φ = 2115651100.

The previous prime is 2115651089. The next prime is 2115651119. The reversal of 2115651101 is 1011565112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1804975225 + 310675876 = 42485^2 + 17626^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2115651101 is a prime.

It is a super-3 number, since 3×2115651101³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2115651301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1057825550 + 1057825551.

It is an arithmetic number, because the mean of its divisors is an integer number (1057825551).

Almost surely, 2^2115651101 is an apocalyptic number.

It is an amenable number.

2115651101 is a deficient number, since it is larger than the sum of its proper divisors (1).

2115651101 is an equidigital number, since it uses as much as digits as its factorization.

2115651101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 300, while the sum is 23.

The square root of 2115651101 is about 45996.2074632246. The cubic root of 2115651101 is about 1283.7526391844.

The spelling of 2115651101 in words is "two billion, one hundred fifteen million, six hundred fifty-one thousand, one hundred one".