121021201200 has 120 divisors (see below), whose sum is σ = 394242177600. Its totient is φ = 31725313280.

The previous prime is 121021201183. The next prime is 121021201207. The reversal of 121021201200 is 2102120121.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×121021201200² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (121021201207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 783870 + ... + 925469.

It is an arithmetic number, because the mean of its divisors is an integer number (3285351480).

Almost surely, 2^121021201200 is an apocalyptic number.

121021201200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121021201200 is an abundant number, since it is smaller than the sum of its proper divisors (273220976400).

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

121021201200 is a wasteful number, since it uses less digits than its factorization.

121021201200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709419 (or 1709408 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121021201200 its reverse (2102120121), we get a palindrome (123123321321).

The spelling of 121021201200 in words is "one hundred twenty-one billion, twenty-one million, two hundred one thousand, two hundred".