121002011200 has 126 divisors (see below), whose sum is σ = 346351504146. Its totient is φ = 41486376960.

The previous prime is 121002011197. The next prime is 121002011237. The reversal of 121002011200 is 2110200121.

It can be written as a sum of positive squares in 3 ways, for example, as 29962225216 + 91039785984 = 173096^2 + 301728^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 693297 + ... + 850096.

Almost surely, 2^121002011200 is an apocalyptic number.

121002011200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121002011200 is an abundant number, since it is smaller than the sum of its proper divisors (225349492946).

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

121002011200 is a wasteful number, since it uses less digits than its factorization.

121002011200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1543429 (or 1543407 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 121002011200 its reverse (2110200121), we get a palindrome (123112211321).

The spelling of 121002011200 in words is "one hundred twenty-one billion, two million, eleven thousand, two hundred".