21122000123432 has 64 divisors (see below), whose sum is σ = 45177401505600. Its totient is φ = 9171434327040.

The previous prime is 21122000123407. The next prime is 21122000123461. The reversal of 21122000123432 is 23432100022112.

It is a super-2 number, since 2×21122000123432² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21122000123398 and 21122000123407.

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, 1918307 + ... + 6776717.

It is an arithmetic number, because the mean of its divisors is an integer number (705896898525).

Almost surely, 2^{21122000123432} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21122000123432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22588700752800).

21122000123432 is an abundant number, since it is smaller than the sum of its proper divisors (24055401382168).

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

21122000123432 is a wasteful number, since it uses less digits than its factorization.

21122000123432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4860906 (or 4860902 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21122000123432 its reverse (23432100022112), we get a palindrome (44554100145544).

The spelling of 21122000123432 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred twenty-three thousand, four hundred thirty-two".