20121132015 has 48 divisors (see below), whose sum is σ = 35339859360. Its totient is φ = 10589230080.

The previous prime is 20121132013. The next prime is 20121132121. The reversal of 20121132015 is 51023112102.

It is not a de Polignac number, because 20121132015 - 2¹ = 20121132013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121132013) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2081784 + ... + 2091426.

It is an arithmetic number, because the mean of its divisors is an integer number (736247070).

Almost surely, 2^20121132015 is an apocalyptic number.

20121132015 is a deficient number, since it is larger than the sum of its proper divisors (15218727345).

20121132015 is a wasteful number, since it uses less digits than its factorization.

20121132015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10264 (or 10261 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 20121132015 its reverse (51023112102), we get a palindrome (71144244117).

The spelling of 20121132015 in words is "twenty billion, one hundred twenty-one million, one hundred thirty-two thousand, fifteen".