20121166012215 has 16 divisors (see below), whose sum is σ = 33888279600000. Its totient is φ = 10166483879712.

The previous prime is 20121166012193. The next prime is 20121166012219. The reversal of 20121166012215 is 51221066112102.

It is not a de Polignac number, because 20121166012215 - 2⁶ = 20121166012151 is a prime.

It is a super-2 number, since 2×20121166012215² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121166012219) 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, 35300290965 + ... + 35300291534.

It is an arithmetic number, because the mean of its divisors is an integer number (2118017475000).

Almost surely, 2^{20121166012215} is an apocalyptic number.

20121166012215 is a deficient number, since it is larger than the sum of its proper divisors (13767113587785).

20121166012215 is a wasteful number, since it uses less digits than its factorization.

20121166012215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70600582526.

The product of its (nonzero) digits is 2880, while the sum is 30.

The spelling of 20121166012215 in words is "twenty trillion, one hundred twenty-one billion, one hundred sixty-six million, twelve thousand, two hundred fifteen".