121121222101100 has 54 divisors (see below), whose sum is σ = 284606204232420. Its totient is φ = 44721682000320.

The previous prime is 121121222101093. The next prime is 121121222101127. The reversal of 121121222101100 is 1101222121121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3583451210 + ... + 3583485009.

Almost surely, 2^{121121222101100} is an apocalyptic number.

121121222101100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121121222101100 is an abundant number, since it is smaller than the sum of its proper divisors (163484982131320).

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

121121222101100 is a wasteful number, since it uses less digits than its factorization.

121121222101100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7166936259 (or 7166936239 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121121222101100 its reverse (1101222121121), we get a palindrome (122222444222221).

The spelling of 121121222101100 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred twenty-two million, one hundred one thousand, one hundred".