1212123408 has 40 divisors (see below), whose sum is σ = 3150090048. Its totient is φ = 401619072.

The previous prime is 1212123389. The next prime is 1212123439. The reversal of 1212123408 is 8043212121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67591 + ... + 83622.

Almost surely, 2^1212123408 is an apocalyptic number.

It is an amenable number.

1212123408 is an abundant number, since it is smaller than the sum of its proper divisors (1937966640).

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

1212123408 is a wasteful number, since it uses less digits than its factorization.

1212123408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151391 (or 151385 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 1212123408 is about 34815.5627270334. The cubic root of 1212123408 is about 1066.2252081185.

Adding to 1212123408 its reverse (8043212121), we get a palindrome (9255335529).

The spelling of 1212123408 in words is "one billion, two hundred twelve million, one hundred twenty-three thousand, four hundred eight".