121420212100 has 72 divisors (see below), whose sum is σ = 290072059200. Its totient is φ = 43747689600.

The previous prime is 121420212037. The next prime is 121420212113. The reversal of 121420212100 is 1212024121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 386440 + ... + 626239.

It is an arithmetic number, because the mean of its divisors is an integer number (4028778600).

Almost surely, 2^121420212100 is an apocalyptic number.

121420212100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121420212100 is an abundant number, since it is smaller than the sum of its proper divisors (168651847100).

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

121420212100 is a wasteful number, since it uses less digits than its factorization.

121420212100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012813 (or 1012806 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121420212100 its reverse (1212024121), we get a palindrome (122632236221).

It can be divided in two parts, 12142021 and 2100, that added together give a palindrome (12144121).

The spelling of 121420212100 in words is "one hundred twenty-one billion, four hundred twenty million, two hundred twelve thousand, one hundred".