121311103212200 has 48 divisors (see below), whose sum is σ = 307689070880160. Its totient is φ = 44113128440000.

The previous prime is 121311103212191. The next prime is 121311103212239. The reversal of 121311103212200 is 2212301113121.

It is a super-2 number, since 2×121311103212200² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 27570703076 + ... + 27570707475.

It is an arithmetic number, because the mean of its divisors is an integer number (6410188976670).

Almost surely, 2^{121311103212200} is an apocalyptic number.

121311103212200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121311103212200 is an abundant number, since it is smaller than the sum of its proper divisors (186377967667960).

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

121311103212200 is a wasteful number, since it uses less digits than its factorization.

121311103212200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55141410578 (or 55141410569 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 121311103212200 its reverse (2212301113121), we get a palindrome (123523404325321).

The spelling of 121311103212200 in words is "one hundred twenty-one trillion, three hundred eleven billion, one hundred three million, two hundred twelve thousand, two hundred".