2115220611 has 16 divisors (see below), whose sum is σ = 3298152704. Its totient is φ = 1180587744.

The previous prime is 2115220607. The next prime is 2115220621. The reversal of 2115220611 is 1160225112.

It is not a de Polignac number, because 2115220611 - 2² = 2115220607 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (2115220621) 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, 1170316 + ... + 1172121.

It is an arithmetic number, because the mean of its divisors is an integer number (206134544).

Almost surely, 2^2115220611 is an apocalyptic number.

2115220611 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2115220611 is a deficient number, since it is larger than the sum of its proper divisors (1182932093).

2115220611 is a wasteful number, since it uses less digits than its factorization.

2115220611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2342490.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 2115220611 is about 45991.5276002005. The cubic root of 2115220611 is about 1283.6655611589.

Adding to 2115220611 its reverse (1160225112), we get a palindrome (3275445723).

The spelling of 2115220611 in words is "two billion, one hundred fifteen million, two hundred twenty thousand, six hundred eleven".