20121122121112 has 16 divisors (see below), whose sum is σ = 38604478488840. Its totient is φ = 9826594524096.

The previous prime is 20121122121103. The next prime is 20121122121127. The reversal of 20121122121112 is 21112122112102.

It is a happy number.

It is a super-2 number, since 2×20121122121112² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20121122121112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29245816693 + ... + 29245817380.

Almost surely, 2^{20121122121112} is an apocalyptic number.

It is an amenable number.

20121122121112 is a deficient number, since it is larger than the sum of its proper divisors (18483356367728).

20121122121112 is a wasteful number, since it uses less digits than its factorization.

20121122121112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58491634122 (or 58491634118 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 20121122121112 its reverse (21112122112102), we get a palindrome (41233244233214).

The spelling of 20121122121112 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred twelve".