20111220303 has 16 divisors (see below), whose sum is σ = 28395184896. Its totient is φ = 12617527680.

The previous prime is 20111220251. The next prime is 20111220307. The reversal of 20111220303 is 30302211102.

It is not a de Polignac number, because 20111220303 - 2¹² = 20111216207 is a prime.

It is a super-2 number, since 2×20111220303² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111220307) 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, 905550 + ... + 927492.

It is an arithmetic number, because the mean of its divisors is an integer number (1774699056).

Almost surely, 2^20111220303 is an apocalyptic number.

20111220303 is a deficient number, since it is larger than the sum of its proper divisors (8283964593).

20111220303 is a wasteful number, since it uses less digits than its factorization.

20111220303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39934.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20111220303 its reverse (30302211102), we get a palindrome (50413431405).

The spelling of 20111220303 in words is "twenty billion, one hundred eleven million, two hundred twenty thousand, three hundred three".