20311202222 has 4 divisors (see below), whose sum is σ = 30466803336. Its totient is φ = 10155601110.

The previous prime is 20311202221. The next prime is 20311202239. The reversal of 20311202222 is 22220211302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22220211302 = 2 ⋅11110105651.

It is a self number, because there is not a number n which added to its sum of digits gives 20311202222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311202221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5077800554 + ... + 5077800557.

It is an arithmetic number, because the mean of its divisors is an integer number (7616700834).

Almost surely, 2^20311202222 is an apocalyptic number.

20311202222 is a deficient number, since it is larger than the sum of its proper divisors (10155601114).

20311202222 is a wasteful number, since it uses less digits than its factorization.

20311202222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10155601113.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20311202222 its reverse (22220211302), we get a palindrome (42531413524).

The spelling of 20311202222 in words is "twenty billion, three hundred eleven million, two hundred two thousand, two hundred twenty-two".