21111210110003 has 16 divisors (see below), whose sum is σ = 23082576120576. Its totient is φ = 19189680602400.

The previous prime is 21111210109961. The next prime is 21111210110041. The reversal of 21111210110003 is 30001101211112.

It is a cyclic number.

It is not a de Polignac number, because 21111210110003 - 2¹² = 21111210105907 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21111210110003.

It is not an unprimeable number, because it can be changed into a prime (21111210110203) 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, 1767551 + ... + 6733992.

It is an arithmetic number, because the mean of its divisors is an integer number (1442661007536).

Almost surely, 2^{21111210110003} is an apocalyptic number.

21111210110003 is a deficient number, since it is larger than the sum of its proper divisors (1971366010573).

21111210110003 is a wasteful number, since it uses less digits than its factorization.

21111210110003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8504474.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 21111210110003 its reverse (30001101211112), we get a palindrome (51112311321115).

The spelling of 21111210110003 in words is "twenty-one trillion, one hundred eleven billion, two hundred ten million, one hundred ten thousand, three".