20011001222 has 16 divisors (see below), whose sum is σ = 30073021440. Its totient is φ = 9986680512.

The previous prime is 20011001173. The next prime is 20011001249. The reversal of 20011001222 is 22210011002.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2638628 + ... + 2646200.

It is an arithmetic number, because the mean of its divisors is an integer number (1879563840).

Almost surely, 2^20011001222 is an apocalyptic number.

20011001222 is a deficient number, since it is larger than the sum of its proper divisors (10062020218).

20011001222 is a wasteful number, since it uses less digits than its factorization.

20011001222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9887.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20011001222 its reverse (22210011002), we get a palindrome (42221012224).

The spelling of 20011001222 in words is "twenty billion, eleven million, one thousand, two hundred twenty-two".