20021221112 has 64 divisors (see below), whose sum is σ = 38430858240. Its totient is φ = 9776592000.

The previous prime is 20021221109. The next prime is 20021221127. The reversal of 20021221112 is 21112212002.

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 15 ways as a sum of consecutive naturals, for example, 31729037 + ... + 31729667.

It is an arithmetic number, because the mean of its divisors is an integer number (600482160).

Almost surely, 2^20021221112 is an apocalyptic number.

It is an amenable number.

20021221112 is a deficient number, since it is larger than the sum of its proper divisors (18409637128).

20021221112 is a wasteful number, since it uses less digits than its factorization.

20021221112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212 (or 1208 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20021221112 its reverse (21112212002), we get a palindrome (41133433114).

The spelling of 20021221112 in words is "twenty billion, twenty-one million, two hundred twenty-one thousand, one hundred twelve".