2121121131200 has 84 divisors (see below), whose sum is σ = 5340662547000. Its totient is φ = 828717066240.

The previous prime is 2121121131197. The next prime is 2121121131251. The reversal of 2121121131200 is 21311211212.

It is a happy number.

It is a super-2 number, since 2×2121121131200² (a number of 25 digits) contains 22 as substring.

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, 15346325 + ... + 15483924.

Almost surely, 2^{2121121131200} is an apocalyptic number.

2121121131200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121121131200 is an abundant number, since it is smaller than the sum of its proper divisors (3219541415800).

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

2121121131200 is a wasteful number, since it uses less digits than its factorization.

2121121131200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30830314 (or 30830299 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 2121121131200 its reverse (21311211212), we get a palindrome (2142432342412).

The spelling of 2121121131200 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred thirty-one thousand, two hundred".