21120120120010 has 32 divisors (see below), whose sum is σ = 38294652819600. Its totient is φ = 8386176294912.

The previous prime is 21120120119999. The next prime is 21120120120019. The reversal of 21120120120010 is 1002102102112.

It can be written as a sum of positive squares in 8 ways, for example, as 294487472889 + 20825632647121 = 542667^2 + 4563511^2 .

It is not an unprimeable number, because it can be changed into a prime (21120120120019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62919742 + ... + 63254518.

Almost surely, 2^{21120120120010} is an apocalyptic number.

21120120120010 is a deficient number, since it is larger than the sum of its proper divisors (17174532699590).

21120120120010 is a wasteful number, since it uses less digits than its factorization.

21120120120010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380970.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21120120120010 its reverse (1002102102112), we get a palindrome (22122222222122).

The spelling of 21120120120010 in words is "twenty-one trillion, one hundred twenty billion, one hundred twenty million, one hundred twenty thousand, ten".