121200320311010 has 32 divisors (see below), whose sum is σ = 237236620627440. Its totient is φ = 44395157071872.

The previous prime is 121200320311009. The next prime is 121200320311033. The reversal of 121200320311010 is 10113023002121.

It can be written as a sum of positive squares in 8 ways, for example, as 57052507062721 + 64147813248289 = 7553311^2 + 8009233^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 121200320311010.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9634359395 + ... + 9634371974.

Almost surely, 2^{121200320311010} is an apocalyptic number.

121200320311010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121200320311010 is a deficient number, since it is larger than the sum of its proper divisors (116036300316430).

121200320311010 is a wasteful number, since it uses less digits than its factorization.

121200320311010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19268731430.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 121200320311010 its reverse (10113023002121), we get a palindrome (131313343313131).

The spelling of 121200320311010 in words is "one hundred twenty-one trillion, two hundred billion, three hundred twenty million, three hundred eleven thousand, ten".