20021122000 has 80 divisors (see below), whose sum is σ = 52812137664. Its totient is φ = 7280400000.

The previous prime is 20021121979. The next prime is 20021122001. The reversal of 20021122000 is 22112002.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×20021122000² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021122001) 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, 433026 + ... + 477025.

Almost surely, 2^20021122000 is an apocalyptic number.

20021122000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021122000 is an abundant number, since it is smaller than the sum of its proper divisors (32791015664).

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

20021122000 is a wasteful number, since it uses less digits than its factorization.

20021122000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910085 (or 910069 counting only the distinct ones).

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

Adding to 20021122000 its reverse (22112002), we get a palindrome (20043234002).

The spelling of 20021122000 in words is "twenty billion, twenty-one million, one hundred twenty-two thousand".