21111001120010 has 16 divisors (see below), whose sum is σ = 38004835905000. Its totient is φ = 8443281806016.

The previous prime is 21111001120009. The next prime is 21111001120039. The reversal of 21111001120010 is 1002110011112.

It can be written as a sum of positive squares in 4 ways, for example, as 20543746615441 + 567254504569 = 4532521^2 + 753163^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21111001119973 and 21111001120000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139750985 + ... + 139901964.

Almost surely, 2^{21111001120010} is an apocalyptic number.

21111001120010 is a deficient number, since it is larger than the sum of its proper divisors (16893834784990).

21111001120010 is a wasteful number, since it uses less digits than its factorization.

21111001120010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279660505.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 21111001120010 its reverse (1002110011112), we get a palindrome (22113111131122).

The spelling of 21111001120010 in words is "twenty-one trillion, one hundred eleven billion, one million, one hundred twenty thousand, ten".