1000022123100 has 576 divisors, whose sum is σ = 3907499904000. Its totient is φ = 190693785600.

The previous prime is 1000022123063. The next prime is 1000022123153. The reversal of 1000022123100 is 13212200001.

It is a super-2 number, since 2×1000022123100² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 51942276 + ... + 51961524.

It is an arithmetic number, because the mean of its divisors is an integer number (6783854000).

Almost surely, 2^{1000022123100} is an apocalyptic number.

1000022123100 is a gapful number since it is divisible by the number (10) 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 1000022123100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1953749952000).

1000022123100 is an abundant number, since it is smaller than the sum of its proper divisors (2907477780900).

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

1000022123100 is a wasteful number, since it uses less digits than its factorization.

1000022123100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19470 (or 19463 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 1000022123100 its reverse (13212200001), we get a palindrome (1013234323101).

The spelling of 1000022123100 in words is "one trillion, twenty-two million, one hundred twenty-three thousand, one hundred".