21120111302203 has 16 divisors (see below), whose sum is σ = 22030740530656. Its totient is φ = 20230555645440.

The previous prime is 21120111302189. The next prime is 21120111302263. The reversal of 21120111302203 is 30220311102112.

It is a cyclic number.

It is not a de Polignac number, because 21120111302203 - 2³³ = 21111521367611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21120111302263) 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, 11062476 + ... + 12830377.

It is an arithmetic number, because the mean of its divisors is an integer number (1376921283166).

Almost surely, 2^{21120111302203} is an apocalyptic number.

21120111302203 is a deficient number, since it is larger than the sum of its proper divisors (910629228453).

21120111302203 is a wasteful number, since it uses less digits than its factorization.

21120111302203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23893294.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21120111302203 its reverse (30220311102112), we get a palindrome (51340422404315).

The spelling of 21120111302203 in words is "twenty-one trillion, one hundred twenty billion, one hundred eleven million, three hundred two thousand, two hundred three".