210121101101200 has 60 divisors (see below), whose sum is σ = 507431572242148. Its totient is φ = 83612956262400.

The previous prime is 210121101101161. The next prime is 210121101101221. The reversal of 210121101101200 is 2101101121012.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 10525690126224 + 199595410974976 = 3244332^2 + 14127824^2 .

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, 1360810761 + ... + 1360965160.

Almost surely, 2^{210121101101200} is an apocalyptic number.

210121101101200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210121101101200 is an abundant number, since it is smaller than the sum of its proper divisors (297310471140948).

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

210121101101200 is a wasteful number, since it uses less digits than its factorization.

210121101101200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2721776132 (or 2721776121 counting only the distinct ones).

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

Adding to 210121101101200 its reverse (2101101121012), we get a palindrome (212222202222212).

The spelling of 210121101101200 in words is "two hundred ten trillion, one hundred twenty-one billion, one hundred one million, one hundred one thousand, two hundred".