212220123 has 8 divisors (see below), whose sum is σ = 290607888. Its totient is φ = 137656224.

The previous prime is 212220121. The next prime is 212220133. The reversal of 212220123 is 321022212.

It is a happy number.

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

It is not a de Polignac number, because 212220123 - 2¹ = 212220121 is a prime.

It is a super-2 number, since 2×212220123² = 90074761212270258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212220121) 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, 955836 + ... + 956057.

It is an arithmetic number, because the mean of its divisors is an integer number (36325986).

Almost surely, 2^212220123 is an apocalyptic number.

212220123 is a deficient number, since it is larger than the sum of its proper divisors (78387765).

212220123 is a wasteful number, since it uses less digits than its factorization.

212220123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1911933.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 212220123 is about 14567.7768722616. The cubic root of 212220123 is about 596.4794977293.

Adding to 212220123 its reverse (321022212), we get a palindrome (533242335).

The spelling of 212220123 in words is "two hundred twelve million, two hundred twenty thousand, one hundred twenty-three".