21000000112122 has 8 divisors (see below), whose sum is σ = 42000000224256. Its totient is φ = 7000000037372.

The previous prime is 21000000112103. The next prime is 21000000112123. The reversal of 21000000112122 is 22121100000012.

It is a sphenic number, since it is the product of 3 distinct primes.

21000000112122 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21000000112098 and 21000000112107.

It is not an unprimeable number, because it can be changed into a prime (21000000112123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1750000009338 + ... + 1750000009349.

It is an arithmetic number, because the mean of its divisors is an integer number (5250000028032).

Almost surely, 2^{21000000112122} is an apocalyptic number.

21000000112122 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21000000112122 is a wasteful number, since it uses less digits than its factorization.

21000000112122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3500000018692.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21000000112122 its reverse (22121100000012), we get a palindrome (43121100112134).

The spelling of 21000000112122 in words is "twenty-one trillion, one hundred twelve thousand, one hundred twenty-two".