20122201000 has 128 divisors (see below), whose sum is σ = 53138592000. Its totient is φ = 7064736000.

The previous prime is 20122200979. The next prime is 20122201019. The reversal of 20122201000 is 10222102.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 287461 + ... + 350539.

It is an arithmetic number, because the mean of its divisors is an integer number (415145250).

Almost surely, 2^20122201000 is an apocalyptic number.

20122201000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20122201000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26569296000).

20122201000 is an abundant number, since it is smaller than the sum of its proper divisors (33016391000).

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

20122201000 is a wasteful number, since it uses less digits than its factorization.

20122201000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63140 (or 63126 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20122201000 its reverse (10222102), we get a palindrome (20132423102).

It can be divided in two parts, 20122 and 201000, that added together give a palindrome (221122).

The spelling of 20122201000 in words is "twenty billion, one hundred twenty-two million, two hundred one thousand".