20011012211222 has 16 divisors (see below), whose sum is σ = 31782315730032. Its totient is φ = 9416911407360.

The previous prime is 20011012211221. The next prime is 20011012211249. The reversal of 20011012211222 is 22211221011002.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 20011012211222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011012211221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9510722 + ... + 11422602.

It is an arithmetic number, because the mean of its divisors is an integer number (1986394733127).

Almost surely, 2^{20011012211222} is an apocalyptic number.

20011012211222 is a deficient number, since it is larger than the sum of its proper divisors (11771303518810).

20011012211222 is a wasteful number, since it uses less digits than its factorization.

20011012211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2219743.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20011012211222 its reverse (22211221011002), we get a palindrome (42222233222224).

The spelling of 20011012211222 in words is "twenty trillion, eleven billion, twelve million, two hundred eleven thousand, two hundred twenty-two".