20122111000 has 64 divisors (see below), whose sum is σ = 47256374880. Its totient is φ = 8019676800.

The previous prime is 20122110997. The next prime is 20122111127. The reversal of 20122111000 is 11122102.

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

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 240679 + ... + 313321.

Almost surely, 2^20122111000 is an apocalyptic number.

20122111000 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 20122111000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23628187440).

20122111000 is an abundant number, since it is smaller than the sum of its proper divisors (27134263880).

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

20122111000 is a wasteful number, since it uses less digits than its factorization.

20122111000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72941 (or 72927 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20122111000 its reverse (11122102), we get a palindrome (20133233102).

The spelling of 20122111000 in words is "twenty billion, one hundred twenty-two million, one hundred eleven thousand".