121340002100 has 144 divisors (see below), whose sum is σ = 279700639680. Its totient is φ = 45563212800.

The previous prime is 121340002099. The next prime is 121340002139. The reversal of 121340002100 is 1200043121.

It is a super-2 number, since 2×121340002100² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 117463184 + ... + 117464216.

Almost surely, 2^121340002100 is an apocalyptic number.

121340002100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121340002100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139850319840).

121340002100 is an abundant number, since it is smaller than the sum of its proper divisors (158360637580).

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

121340002100 is a wasteful number, since it uses less digits than its factorization.

121340002100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570 (or 1563 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 121340002100 its reverse (1200043121), we get a palindrome (122540045221).

The spelling of 121340002100 in words is "one hundred twenty-one billion, three hundred forty million, two thousand, one hundred".