1017100072172 has 12 divisors (see below), whose sum is σ = 1779973768440. Its totient is φ = 508536138336.

The previous prime is 1017100072129. The next prime is 1017100072181. The reversal of 1017100072172 is 2712700017101.

It is a super-3 number, since 3×1017100072172³ (a number of 37 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3308897 + ... + 3603192.

It is an arithmetic number, because the mean of its divisors is an integer number (148331147370).

Almost surely, 2^{1017100072172} is an apocalyptic number.

It is an amenable number.

1017100072172 is a deficient number, since it is larger than the sum of its proper divisors (762873696268).

1017100072172 is a wasteful number, since it uses less digits than its factorization.

1017100072172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6948880 (or 6948878 counting only the distinct ones).

The product of its (nonzero) digits is 1372, while the sum is 29.

Adding to 1017100072172 its reverse (2712700017101), we get a palindrome (3729800089273).

The spelling of 1017100072172 in words is "one trillion, seventeen billion, one hundred million, seventy-two thousand, one hundred seventy-two".