21122120003 has 2 divisors, whose sum is σ = 21122120004. Its totient is φ = 21122120002.

The previous prime is 21122119987. The next prime is 21122120011. The reversal of 21122120003 is 30002122112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21122120003 - 2⁴ = 21122119987 is a prime.

It is a super-2 number, since 2×21122120003² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21122120003.

It is not a weakly prime, because it can be changed into another prime (21122120603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561060001 + 10561060002.

It is an arithmetic number, because the mean of its divisors is an integer number (10561060002).

Almost surely, 2^21122120003 is an apocalyptic number.

21122120003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21122120003 is an equidigital number, since it uses as much as digits as its factorization.

21122120003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21122120003 its reverse (30002122112), we get a palindrome (51124242115).

The spelling of 21122120003 in words is "twenty-one billion, one hundred twenty-two million, one hundred twenty thousand, three".