121302240100 has 36 divisors (see below), whose sum is σ = 264007020004. Its totient is φ = 48376903680.

The previous prime is 121302240071. The next prime is 121302240121. The reversal of 121302240100 is 1042203121.

It can be written as a sum of positive squares in 6 ways, for example, as 31862964004 + 89439276096 = 178502^2 + 299064^2 .

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 11 ways as a sum of consecutive naturals, for example, 1766037 + ... + 1833436.

Almost surely, 2^121302240100 is an apocalyptic number.

121302240100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121302240100 is an abundant number, since it is smaller than the sum of its proper divisors (142704779904).

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

121302240100 is a wasteful number, since it uses less digits than its factorization.

121302240100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3599824 (or 3599817 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 121302240100 its reverse (1042203121), we get a palindrome (122344443221).

The spelling of 121302240100 in words is "one hundred twenty-one billion, three hundred two million, two hundred forty thousand, one hundred".