20001122000 has 80 divisors (see below), whose sum is σ = 50465555712. Its totient is φ = 7652585600.

The previous prime is 20001121997. The next prime is 20001122041. The reversal of 20001122000 is 22110002.

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

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171404 + ... + 263403.

Almost surely, 2^20001122000 is an apocalyptic number.

20001122000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001122000 is an abundant number, since it is smaller than the sum of its proper divisors (30464433712).

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

20001122000 is a wasteful number, since it uses less digits than its factorization.

20001122000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434853 (or 434837 counting only the distinct ones).

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

Adding to 20001122000 its reverse (22110002), we get a palindrome (20023232002).

The spelling of 20001122000 in words is "twenty billion, one million, one hundred twenty-two thousand".