121121001200 has 60 divisors (see below), whose sum is σ = 291058454400. Its totient is φ = 48437537280.

The previous prime is 121121001173. The next prime is 121121001223. The reversal of 121121001200 is 2100121121.

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, 1888052 + ... + 1951148.

It is an arithmetic number, because the mean of its divisors is an integer number (4850974240).

Almost surely, 2^121121001200 is an apocalyptic number.

121121001200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121121001200 is an abundant number, since it is smaller than the sum of its proper divisors (169937453200).

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

121121001200 is a wasteful number, since it uses less digits than its factorization.

121121001200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67914 (or 67903 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121121001200 its reverse (2100121121), we get a palindrome (123221122321).

The spelling of 121121001200 in words is "one hundred twenty-one billion, one hundred twenty-one million, one thousand, two hundred".