12212290 has 16 divisors (see below), whose sum is σ = 23275512. Its totient is φ = 4597504.

The previous prime is 12212279. The next prime is 12212293. The reversal of 12212290 is 9221221.

It can be written as a sum of positive squares in 4 ways, for example, as 11269449 + 942841 = 3357^2 + 971^2 .

It is not an unprimeable number, because it can be changed into a prime (12212293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35749 + ... + 36088.

Almost surely, 2^12212290 is an apocalyptic number.

12212290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12212290 is a deficient number, since it is larger than the sum of its proper divisors (11063222).

12212290 is a wasteful number, since it uses less digits than its factorization.

12212290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71861.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 12212290 is about 3494.6087048481. The cubic root of 12212290 is about 230.2850278553.

The spelling of 12212290 in words is "twelve million, two hundred twelve thousand, two hundred ninety".