1212133550 has 12 divisors (see below), whose sum is σ = 2254568496. Its totient is φ = 484853400.

The previous prime is 1212133523. The next prime is 1212133567. The reversal of 1212133550 is 553312121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12121286 + ... + 12121385.

It is an arithmetic number, because the mean of its divisors is an integer number (187880708).

Almost surely, 2^1212133550 is an apocalyptic number.

1212133550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212133550 is a deficient number, since it is larger than the sum of its proper divisors (1042434946).

1212133550 is a wasteful number, since it uses less digits than its factorization.

1212133550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24242683 (or 24242678 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1212133550 is about 34815.7083799827. The cubic root of 1212133550 is about 1066.2281818603.

Adding to 1212133550 its reverse (553312121), we get a palindrome (1765445671).

The spelling of 1212133550 in words is "one billion, two hundred twelve million, one hundred thirty-three thousand, five hundred fifty".