121210210121200 has 60 divisors (see below), whose sum is σ = 291209626580760. Its totient is φ = 48483734951680.

The previous prime is 121210210121197. The next prime is 121210210121227. The reversal of 121210210121200 is 2121012012121.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

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, 58611207 + ... + 60643993.

It is an arithmetic number, because the mean of its divisors is an integer number (4853493776346).

Almost surely, 2^{121210210121200} is an apocalyptic number.

121210210121200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121210210121200 is an abundant number, since it is smaller than the sum of its proper divisors (169999416459560).

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

121210210121200 is a wasteful number, since it uses less digits than its factorization.

121210210121200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2181874 (or 2181863 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121210210121200 its reverse (2121012012121), we get a palindrome (123331222133321).

The spelling of 121210210121200 in words is "one hundred twenty-one trillion, two hundred ten billion, two hundred ten million, one hundred twenty-one thousand, two hundred".