20120122221112 has 8 divisors (see below), whose sum is σ = 37725229164600. Its totient is φ = 10060061110552.

The previous prime is 20120122221107. The next prime is 20120122221179. The reversal of 20120122221112 is 21112222102102.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 20120122221112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1257507638812 + ... + 1257507638827.

It is an arithmetic number, because the mean of its divisors is an integer number (4715653645575).

Almost surely, 2^{20120122221112} is an apocalyptic number.

It is an amenable number.

20120122221112 is a deficient number, since it is larger than the sum of its proper divisors (17605106943488).

20120122221112 is a wasteful number, since it uses less digits than its factorization.

20120122221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2515015277645 (or 2515015277641 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20120122221112 its reverse (21112222102102), we get a palindrome (41232344323214).

The spelling of 20120122221112 in words is "twenty trillion, one hundred twenty billion, one hundred twenty-two million, two hundred twenty-one thousand, one hundred twelve".