210121110000 has 150 divisors (see below), whose sum is σ = 734824187240. Its totient is φ = 56032272000.

The previous prime is 210121109971. The next prime is 210121110011. The reversal of 210121110000 is 11121012.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (150).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1077340 + ... + 1257339.

Almost surely, 2^210121110000 is an apocalyptic number.

210121110000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210121110000 is an abundant number, since it is smaller than the sum of its proper divisors (524703077240).

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

210121110000 is a wasteful number, since it uses less digits than its factorization.

210121110000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2334713 (or 2334689 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 210121110000 its reverse (11121012), we get a palindrome (210132231012).

The spelling of 210121110000 in words is "two hundred ten billion, one hundred twenty-one million, one hundred ten thousand".