20121121222122 has 16 divisors (see below), whose sum is σ = 40242286395360. Its totient is φ = 6707033082192.

The previous prime is 20121121222067. The next prime is 20121121222127. The reversal of 20121121222122 is 22122212112102.

It is a super-3 number, since 3×20121121222122³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20121121222127) 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, 9999504 + ... + 11841972.

It is an arithmetic number, because the mean of its divisors is an integer number (2515142899710).

Almost surely, 2^{20121121222122} is an apocalyptic number.

20121121222122 is an abundant number, since it is smaller than the sum of its proper divisors (20121165173238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20121121222122 is a wasteful number, since it uses less digits than its factorization.

20121121222122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3662597.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 20121121222122 its reverse (22122212112102), we get a palindrome (42243333334224).

The spelling of 20121121222122 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred twenty-two".