2115121101 has 16 divisors (see below), whose sum is σ = 2959234560. Its totient is φ = 1341230000.

The previous prime is 2115121067. The next prime is 2115121111. The reversal of 2115121101 is 1011215112.

It is a cyclic number.

It is not a de Polignac number, because 2115121101 - 2⁹ = 2115120589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115121111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73275 + ... + 97976.

It is an arithmetic number, because the mean of its divisors is an integer number (184952160).

Almost surely, 2^2115121101 is an apocalyptic number.

It is an amenable number.

2115121101 is a deficient number, since it is larger than the sum of its proper divisors (844113459).

2115121101 is a wasteful number, since it uses less digits than its factorization.

2115121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171456.

The product of its (nonzero) digits is 20, while the sum is 15.

The square root of 2115121101 is about 45990.4457577876. The cubic root of 2115121101 is about 1283.6454309397.

Adding to 2115121101 its reverse (1011215112), we get a palindrome (3126336213).

The spelling of 2115121101 in words is "two billion, one hundred fifteen million, one hundred twenty-one thousand, one hundred one".