20021110012 has 72 divisors (see below), whose sum is σ = 37469748960. Its totient is φ = 9341798400.

The previous prime is 20021109991. The next prime is 20021110033. The reversal of 20021110012 is 21001112002.

It is an interprime number because it is at equal distance from previous prime (20021109991) and next prime (20021110033).

It is a super-2 number, since 2×20021110012² (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 23 ways as a sum of consecutive naturals, for example, 87428314 + ... + 87428542.

It is an arithmetic number, because the mean of its divisors is an integer number (520413180).

Almost surely, 2^20021110012 is an apocalyptic number.

It is an amenable number.

20021110012 is a deficient number, since it is larger than the sum of its proper divisors (17448638948).

20021110012 is a wasteful number, since it uses less digits than its factorization.

20021110012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551 (or 452 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20021110012 its reverse (21001112002), we get a palindrome (41022222014).

The spelling of 20021110012 in words is "twenty billion, twenty-one million, one hundred ten thousand, twelve".