2171112609512 has 128 divisors (see below), whose sum is σ = 5297953409280. Its totient is φ = 809533440000.

The previous prime is 2171112609493. The next prime is 2171112609529. The reversal of 2171112609512 is 2159062111712.

It is a happy number.

2171112609512 is an astonishing number since 2171112609512 = 609512 + ... + 2171112.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 609512 + ... + 2171112.

It is an arithmetic number, because the mean of its divisors is an integer number (41390261010).

Almost surely, 2^{2171112609512} is an apocalyptic number.

2171112609512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2171112609512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2648976704640).

2171112609512 is an abundant number, since it is smaller than the sum of its proper divisors (3126840799768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2171112609512 is a wasteful number, since it uses less digits than its factorization.

2171112609512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561723 (or 1561719 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 38.

The spelling of 2171112609512 in words is "two trillion, one hundred seventy-one billion, one hundred twelve million, six hundred nine thousand, five hundred twelve".