20021122201000 has 64 divisors (see below), whose sum is σ = 46920304089360. Its totient is φ = 7996332960000.

The previous prime is 20021122200977. The next prime is 20021122201001. The reversal of 20021122201000 is 10222112002.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2574311145156 + 17446811055844 = 1604466^2 + 4176938^2 .

It is not an unprimeable number, because it can be changed into a prime (20021122201001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14483571 + ... + 15805570.

Almost surely, 2^{20021122201000} is an apocalyptic number.

20021122201000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021122201000 is an abundant number, since it is smaller than the sum of its proper divisors (26899181888360).

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

20021122201000 is a wasteful number, since it uses less digits than its factorization.

20021122201000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30289823 (or 30289809 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20021122201000 its reverse (10222112002), we get a palindrome (20031344313002).

The spelling of 20021122201000 in words is "twenty trillion, twenty-one billion, one hundred twenty-two million, two hundred one thousand".