20113222201212 has 192 divisors, whose sum is σ = 54414354677760. Its totient is φ = 5663874585600.

The previous prime is 20113222201201. The next prime is 20113222201243. The reversal of 20113222201212 is 21210222231102.

It is a super-3 number, since 3×20113222201212³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1077234637 + ... + 1077253307.

It is an arithmetic number, because the mean of its divisors is an integer number (283408097280).

Almost surely, 2^{20113222201212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20113222201212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27207177338880).

20113222201212 is an abundant number, since it is smaller than the sum of its proper divisors (34301132476548).

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

20113222201212 is a wasteful number, since it uses less digits than its factorization.

20113222201212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19472 (or 19470 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 20113222201212 its reverse (21210222231102), we get a palindrome (41323444432314).

The spelling of 20113222201212 in words is "twenty trillion, one hundred thirteen billion, two hundred twenty-two million, two hundred one thousand, two hundred twelve".