210123071998 has 16 divisors (see below), whose sum is σ = 360232796160. Its totient is φ = 90047291256.

The previous prime is 210123071993. The next prime is 210123072011. The reversal of 210123071998 is 899170321012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210123071993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210558 + ... + 681601.

It is an arithmetic number, because the mean of its divisors is an integer number (22514549760).

Almost surely, 2^210123071998 is an apocalyptic number.

210123071998 is a deficient number, since it is larger than the sum of its proper divisors (150109724162).

210123071998 is a wasteful number, since it uses less digits than its factorization.

210123071998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908991.

The product of its (nonzero) digits is 54432, while the sum is 43.

The spelling of 210123071998 in words is "two hundred ten billion, one hundred twenty-three million, seventy-one thousand, nine hundred ninety-eight".