999141220231 has 32 divisors (see below), whose sum is σ = 1280400196608. Its totient is φ = 756887639040.

The previous prime is 999141220219. The next prime is 999141220243. The reversal of 999141220231 is 132022141999.

It is an interprime number because it is at equal distance from previous prime (999141220219) and next prime (999141220243).

It is a cyclic number.

It is not a de Polignac number, because 999141220231 - 2⁹ = 999141219719 is a prime.

It is a super-2 number, since 2×999141220231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999141220331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3340951 + ... + 3627703.

It is an arithmetic number, because the mean of its divisors is an integer number (40012506144).

Almost surely, 2^999141220231 is an apocalyptic number.

999141220231 is a deficient number, since it is larger than the sum of its proper divisors (281258976377).

999141220231 is a wasteful number, since it uses less digits than its factorization.

999141220231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288031.

The product of its (nonzero) digits is 69984, while the sum is 43.

The spelling of 999141220231 in words is "nine hundred ninety-nine billion, one hundred forty-one million, two hundred twenty thousand, two hundred thirty-one".