20113233121212 has 192 divisors, whose sum is σ = 60445219258368. Its totient is φ = 5051797920000.

The previous prime is 20113233121211. The next prime is 20113233121217. The reversal of 20113233121212 is 21212133231102.

It is a super-2 number, since 2×20113233121212² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113233121211) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 36995983 + ... + 37535705.

It is an arithmetic number, because the mean of its divisors is an integer number (314818850304).

Almost surely, 2^{20113233121212} is an apocalyptic number.

20113233121212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20113233121212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30222609629184).

20113233121212 is an abundant number, since it is smaller than the sum of its proper divisors (40331986137156).

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

20113233121212 is a wasteful number, since it uses less digits than its factorization.

20113233121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541080 (or 541078 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 20113233121212 its reverse (21212133231102), we get a palindrome (41325366352314).

The spelling of 20113233121212 in words is "twenty trillion, one hundred thirteen billion, two hundred thirty-three million, one hundred twenty-one thousand, two hundred twelve".