20011220222 has 32 divisors (see below), whose sum is σ = 35352253440. Its totient is φ = 8316918720.

The previous prime is 20011220213. The next prime is 20011220231. The reversal of 20011220222 is 22202211002.

It is an interprime number because it is at equal distance from previous prime (20011220213) and next prime (20011220231).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 20011220197 and 20011220206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8522 + ... + 200237.

It is an arithmetic number, because the mean of its divisors is an integer number (1104757920).

Almost surely, 2^20011220222 is an apocalyptic number.

20011220222 is a deficient number, since it is larger than the sum of its proper divisors (15341033218).

20011220222 is a wasteful number, since it uses less digits than its factorization.

20011220222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208976.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20011220222 its reverse (22202211002), we get a palindrome (42213431224).

The spelling of 20011220222 in words is "twenty billion, eleven million, two hundred twenty thousand, two hundred twenty-two".