210121112121100 has 36 divisors (see below), whose sum is σ = 457153316815104. Its totient is φ = 83828997196480.

The previous prime is 210121112121061. The next prime is 210121112121131. The reversal of 210121112121100 is 1121211121012.

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, 2743057159 + ... + 2743133758.

It is an arithmetic number, because the mean of its divisors is an integer number (12698703244864).

Almost surely, 2^{210121112121100} is an apocalyptic number.

210121112121100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210121112121100 is an abundant number, since it is smaller than the sum of its proper divisors (247032204694004).

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

210121112121100 is a wasteful number, since it uses less digits than its factorization.

210121112121100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5486191314 (or 5486191307 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 210121112121100 its reverse (1121211121012), we get a palindrome (211242323242112).

The spelling of 210121112121100 in words is "two hundred ten trillion, one hundred twenty-one billion, one hundred twelve million, one hundred twenty-one thousand, one hundred".