6999012171 has 16 divisors (see below), whose sum is σ = 10819729920. Its totient is φ = 4463137800.

The previous prime is 6999012169. The next prime is 6999012173. The reversal of 6999012171 is 1712109996.

It is an interprime number because it is at equal distance from previous prime (6999012169) and next prime (6999012173).

It is not a de Polignac number, because 6999012171 - 2¹ = 6999012169 is a prime.

It is a super-2 number, since 2×6999012171² = 97972342739612266482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6999012173) 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, 5634655 + ... + 5635896.

It is an arithmetic number, because the mean of its divisors is an integer number (676233120).

Almost surely, 2^6999012171 is an apocalyptic number.

6999012171 is a deficient number, since it is larger than the sum of its proper divisors (3820717749).

6999012171 is a wasteful number, since it uses less digits than its factorization.

6999012171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11270583 (or 11270577 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 45.

The square root of 6999012171 is about 83660.0990377133. The cubic root of 6999012171 is about 1912.8411952585.

The spelling of 6999012171 in words is "six billion, nine hundred ninety-nine million, twelve thousand, one hundred seventy-one".