1212144520 has 32 divisors (see below), whose sum is σ = 2870870400. Its totient is φ = 459338688.

The previous prime is 1212144517. The next prime is 1212144553. The reversal of 1212144520 is 254412121.

It is a junction number, because it is equal to n+sod(n) for n = 1212144491 and 1212144500.

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, 796704 + ... + 798223.

It is an arithmetic number, because the mean of its divisors is an integer number (89714700).

Almost surely, 2^1212144520 is an apocalyptic number.

1212144520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212144520 is an abundant number, since it is smaller than the sum of its proper divisors (1658725880).

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

1212144520 is a wasteful number, since it uses less digits than its factorization.

1212144520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1594957 (or 1594953 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 1212144520 is about 34815.8659234551. The cubic root of 1212144520 is about 1066.2313983617.

Adding to 1212144520 its reverse (254412121), we get a palindrome (1466556641).

The spelling of 1212144520 in words is "one billion, two hundred twelve million, one hundred forty-four thousand, five hundred twenty".