20011212222 has 8 divisors (see below), whose sum is σ = 40022424456. Its totient is φ = 6670404072.

The previous prime is 20011212197. The next prime is 20011212241. The reversal of 20011212222 is 22221211002.

It is a sphenic number, since it is the product of 3 distinct primes.

20011212222 is an admirable number.

It is a super-2 number, since 2×20011212222² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1667601013 + ... + 1667601024.

It is an arithmetic number, because the mean of its divisors is an integer number (5002803057).

Almost surely, 2^20011212222 is an apocalyptic number.

20011212222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20011212222 is a wasteful number, since it uses less digits than its factorization.

20011212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3335202042.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20011212222 its reverse (22221211002), we get a palindrome (42232423224).

The spelling of 20011212222 in words is "twenty billion, eleven million, two hundred twelve thousand, two hundred twenty-two".