12901122 has 36 divisors (see below), whose sum is σ = 30275154. Its totient is φ = 3968640.

The previous prime is 12901103. The next prime is 12901127. The reversal of 12901122 is 22110921.

It can be written as a sum of positive squares in 3 ways, for example, as 10439361 + 2461761 = 3231^2 + 1569^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12901095 and 12901104.

It is not an unprimeable number, because it can be changed into a prime (12901127) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 922 + ... + 5162.

Almost surely, 2^12901122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12901122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15137577).

12901122 is an abundant number, since it is smaller than the sum of its proper divisors (17374032).

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

12901122 is a wasteful number, since it uses less digits than its factorization.

12901122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4275 (or 4259 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 12901122 is about 3591.8131911334. The cubic root of 12901122 is about 234.5358092138.

The spelling of 12901122 in words is "twelve million, nine hundred one thousand, one hundred twenty-two".