21122025403 has 2 divisors, whose sum is σ = 21122025404. Its totient is φ = 21122025402.

The previous prime is 21122025389. The next prime is 21122025409. The reversal of 21122025403 is 30452022112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21122025403 - 2¹³ = 21122017211 is a prime.

It is a super-2 number, since 2×21122025403² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21122025409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561012701 + 10561012702.

It is an arithmetic number, because the mean of its divisors is an integer number (10561012702).

Almost surely, 2^21122025403 is an apocalyptic number.

21122025403 is a deficient number, since it is larger than the sum of its proper divisors (1).

21122025403 is an equidigital number, since it uses as much as digits as its factorization.

21122025403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 21122025403 its reverse (30452022112), we get a palindrome (51574047515).

The spelling of 21122025403 in words is "twenty-one billion, one hundred twenty-two million, twenty-five thousand, four hundred three".