211220042403 has 16 divisors (see below), whose sum is σ = 298267902080. Its totient is φ = 132583708224.

The previous prime is 211220042399. The next prime is 211220042413. The reversal of 211220042403 is 304240022112.

It is not a de Polignac number, because 211220042403 - 2² = 211220042399 is a prime.

It is a super-2 number, since 2×211220042403² (a number of 23 digits) contains 22 as substring.

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 211220042403.

It is not an unprimeable number, because it can be changed into a prime (211220042413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11357626 + ... + 11376207.

It is an arithmetic number, because the mean of its divisors is an integer number (18641743880).

Almost surely, 2^211220042403 is an apocalyptic number.

211220042403 is a deficient number, since it is larger than the sum of its proper divisors (87047859677).

211220042403 is a wasteful number, since it uses less digits than its factorization.

211220042403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22734018.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 211220042403 its reverse (304240022112), we get a palindrome (515460064515).

The spelling of 211220042403 in words is "two hundred eleven billion, two hundred twenty million, forty-two thousand, four hundred three".