20121122202112 has 20 divisors (see below), whose sum is σ = 40202945338446. Its totient is φ = 10060561100800.

The previous prime is 20121122202107. The next prime is 20121122202113. The reversal of 20121122202112 is 21120222112102.

It can be written as a sum of positive squares in only one way, i.e., 16355100692736 + 3766021509376 = 4044144^2 + 1940624^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20121122202112.

It is not an unprimeable number, because it can be changed into a prime (20121122202113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19649532889 + ... + 19649533912.

Almost surely, 2^{20121122202112} is an apocalyptic number.

It is an amenable number.

20121122202112 is a deficient number, since it is larger than the sum of its proper divisors (20081823136334).

20121122202112 is an frugal number, since it uses more digits than its factorization.

20121122202112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39299066819 (or 39299066803 counting only the distinct ones).

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

Adding to 20121122202112 its reverse (21120222112102), we get a palindrome (41241344314214).

The spelling of 20121122202112 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred two thousand, one hundred twelve".