20522101212 has 18 divisors (see below), whose sum is σ = 51875311488. Its totient is φ = 6840700392.

The previous prime is 20522101211. The next prime is 20522101213. The reversal of 20522101212 is 21210122502.

20522101212 is a `hidden beast` number, since 20 + 522 + 1 + 0 + 121 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (20522101211) and next prime (20522101213).

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20522101211) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 285029148 + ... + 285029219.

Almost surely, 2^20522101212 is an apocalyptic number.

It is an amenable number.

20522101212 is an abundant number, since it is smaller than the sum of its proper divisors (31353210276).

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

20522101212 is a wasteful number, since it uses less digits than its factorization.

20522101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570058377 (or 570058372 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

Adding to 20522101212 its reverse (21210122502), we get a palindrome (41732223714).

The spelling of 20522101212 in words is "twenty billion, five hundred twenty-two million, one hundred one thousand, two hundred twelve".