21120111101002 has 8 divisors (see below), whose sum is σ = 32772586191300. Its totient is φ = 10195915703904.

The previous prime is 21120111100981. The next prime is 21120111101039. The reversal of 21120111101002 is 20010111102112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21020766995281 + 99344105721 = 4584841^2 + 315189^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 182069923227 + ... + 182069923342.

Almost surely, 2^{21120111101002} is an apocalyptic number.

21120111101002 is a deficient number, since it is larger than the sum of its proper divisors (11652475090298).

21120111101002 is a wasteful number, since it uses less digits than its factorization.

21120111101002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364139846600.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21120111101002 its reverse (20010111102112), we get a palindrome (41130222203114).

The spelling of 21120111101002 in words is "twenty-one trillion, one hundred twenty billion, one hundred eleven million, one hundred one thousand, two".