123512212 has 6 divisors (see below), whose sum is σ = 216146378. Its totient is φ = 61756104.

The previous prime is 123512197. The next prime is 123512219. The reversal of 123512212 is 212215321.

It can be written as a sum of positive squares in only one way, i.e., 120428676 + 3083536 = 10974^2 + 1756^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 123512212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123512219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15439023 + ... + 15439030.

Almost surely, 2^123512212 is an apocalyptic number.

It is an amenable number.

123512212 is a deficient number, since it is larger than the sum of its proper divisors (92634166).

123512212 is a wasteful number, since it uses less digits than its factorization.

123512212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30878057 (or 30878055 counting only the distinct ones).

The product of its digits is 240, while the sum is 19.

The square root of 123512212 is about 11113.6048157202. The cubic root of 123512212 is about 498.0083599399.

Adding to 123512212 its reverse (212215321), we get a palindrome (335727533).

The spelling of 123512212 in words is "one hundred twenty-three million, five hundred twelve thousand, two hundred twelve".