20011212224 has 28 divisors (see below), whose sum is σ = 41799738600. Its totient is φ = 9478994688.

The previous prime is 20011212197. The next prime is 20011212241. The reversal of 20011212224 is 42221211002.

It is a super-2 number, since 2×20011212224² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8227079 + ... + 8229510.

Almost surely, 2^20011212224 is an apocalyptic number.

It is an amenable number.

20011212224 is an abundant number, since it is smaller than the sum of its proper divisors (21788526376).

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

20011212224 is a wasteful number, since it uses less digits than its factorization.

20011212224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16456620 (or 16456610 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20011212224 its reverse (42221211002), we get a palindrome (62232423226).

The spelling of 20011212224 in words is "twenty billion, eleven million, two hundred twelve thousand, two hundred twenty-four".