210121111021100 has 36 divisors (see below), whose sum is σ = 455963441149104. Its totient is φ = 84048328236480.

The previous prime is 210121111021067. The next prime is 210121111021121. The reversal of 210121111021100 is 1120111121012.

210121111021100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135768842 + ... + 137307758.

Almost surely, 2^{210121111021100} is an apocalyptic number.

210121111021100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210121111021100 is an abundant number, since it is smaller than the sum of its proper divisors (245842330128004).

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

210121111021100 is a wasteful number, since it uses less digits than its factorization.

210121111021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2904314 (or 2904307 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 210121111021100 its reverse (1120111121012), we get a palindrome (211241222142112).

The spelling of 210121111021100 in words is "two hundred ten trillion, one hundred twenty-one billion, one hundred eleven million, twenty-one thousand, one hundred".