121085782900 has 18 divisors (see below), whose sum is σ = 262756149110. Its totient is φ = 48434313120.

The previous prime is 121085782861. The next prime is 121085782919. The reversal of 121085782900 is 9287580121.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 11675666916 + 109410115984 = 108054^2 + 330772^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 605428815 + ... + 605429014.

Almost surely, 2^121085782900 is an apocalyptic number.

121085782900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121085782900 is an abundant number, since it is smaller than the sum of its proper divisors (141670366210).

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

121085782900 is a wasteful number, since it uses less digits than its factorization.

121085782900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210857843 (or 1210857836 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 43.

The spelling of 121085782900 in words is "one hundred twenty-one billion, eighty-five million, seven hundred eighty-two thousand, nine hundred".