210000121111120 has 40 divisors (see below), whose sum is σ = 488253377578464. Its totient is φ = 83999515800192.

The previous prime is 210000121111069. The next prime is 210000121111129. The reversal of 210000121111120 is 21111121000012.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 210000121111120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210000121111129) 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, 4495207 + ... + 20981113.

Almost surely, 2^{210000121111120} is an apocalyptic number.

210000121111120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210000121111120 is an abundant number, since it is smaller than the sum of its proper divisors (278253256467344).

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

210000121111120 is a wasteful number, since it uses less digits than its factorization.

210000121111120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16645147 (or 16645141 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 210000121111120 its reverse (21111121000012), we get a palindrome (231111242111132).

The spelling of 210000121111120 in words is "two hundred ten trillion, one hundred twenty-one million, one hundred eleven thousand, one hundred twenty".