121030542042100 has 18 divisors (see below), whose sum is σ = 262636276231574. Its totient is φ = 48412216816800.

The previous prime is 121030542042041. The next prime is 121030542042209. The reversal of 121030542042100 is 1240245030121.

It can be written as a sum of positive squares in 3 ways, for example, as 204631379044 + 120825910663056 = 452362^2 + 10992084^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

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, 605152710111 + ... + 605152710310.

Almost surely, 2^{121030542042100} is an apocalyptic number.

121030542042100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121030542042100 is an abundant number, since it is smaller than the sum of its proper divisors (141605734189474).

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

121030542042100 is a wasteful number, since it uses less digits than its factorization.

121030542042100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1210305420435 (or 1210305420428 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 121030542042100 its reverse (1240245030121), we get a palindrome (122270787072221).

The spelling of 121030542042100 in words is "one hundred twenty-one trillion, thirty billion, five hundred forty-two million, forty-two thousand, one hundred".