21121022111003 has 16 divisors (see below), whose sum is σ = 22021265097216. Its totient is φ = 20239417816800.

The previous prime is 21121022110879. The next prime is 21121022111009. The reversal of 21121022111003 is 30011122012112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21121022111003 - 2²⁶ = 21120955002139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21121022111009) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 40321928 + ... + 40842378.

It is an arithmetic number, because the mean of its divisors is an integer number (1376329068576).

Almost surely, 2^{21121022111003} is an apocalyptic number.

21121022111003 is a deficient number, since it is larger than the sum of its proper divisors (900242986213).

21121022111003 is a wasteful number, since it uses less digits than its factorization.

21121022111003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538354.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 21121022111003 its reverse (30011122012112), we get a palindrome (51132144123115).

The spelling of 21121022111003 in words is "twenty-one trillion, one hundred twenty-one billion, twenty-two million, one hundred eleven thousand, three".