20121111022 has 16 divisors (see below), whose sum is σ = 33346497312. Its totient is φ = 9057072640.

The previous prime is 20121111001. The next prime is 20121111061. The reversal of 20121111022 is 22011112102.

It is a junction number, because it is equal to n+sod(n) for n = 20121110993 and 20121111011.

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, 12864379 + ... + 12865942.

It is an arithmetic number, because the mean of its divisors is an integer number (2084156082).

Almost surely, 2^20121111022 is an apocalyptic number.

20121111022 is a deficient number, since it is larger than the sum of its proper divisors (13225386290).

20121111022 is a wasteful number, since it uses less digits than its factorization.

20121111022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25730363.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20121111022 its reverse (22011112102), we get a palindrome (42132223124).

The spelling of 20121111022 in words is "twenty billion, one hundred twenty-one million, one hundred eleven thousand, twenty-two".