20121122212028 has 24 divisors (see below), whose sum is σ = 37095189104400. Its totient is φ = 9523352867328.

The previous prime is 20121122212027. The next prime is 20121122212031. The reversal of 20121122212028 is 82021222112102.

It is a junction number, because it is equal to n+sod(n) for n = 20121122211988 and 20121122212006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121122212021) 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, 106919573 + ... + 107107596.

It is an arithmetic number, because the mean of its divisors is an integer number (1545632879350).

Almost surely, 2^{20121122212028} is an apocalyptic number.

It is an amenable number.

20121122212028 is a deficient number, since it is larger than the sum of its proper divisors (16974066892372).

20121122212028 is a wasteful number, since it uses less digits than its factorization.

20121122212028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214028429 (or 214028427 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 26.

The spelling of 20121122212028 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred twelve thousand, twenty-eight".