20011222210 has 24 divisors (see below), whose sum is σ = 41901049980. Its totient is φ = 6860990304.

The previous prime is 20011222193. The next prime is 20011222211. The reversal of 20011222210 is 1222211002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19877334169 + 133888041 = 140987^2 + 11571^2 .

It is not an unprimeable number, because it can be changed into a prime (20011222211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20419125 + ... + 20420104.

Almost surely, 2^20011222210 is an apocalyptic number.

20011222210 is an abundant number, since it is smaller than the sum of its proper divisors (21889827770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20011222210 is a wasteful number, since it uses less digits than its factorization.

20011222210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40839250 (or 40839243 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20011222210 its reverse (1222211002), we get a palindrome (21233433212).

The spelling of 20011222210 in words is "twenty billion, eleven million, two hundred twenty-two thousand, two hundred ten".