1212251013 has 24 divisors (see below), whose sum is σ = 1761560736. Its totient is φ = 803325600.

The previous prime is 1212251003. The next prime is 1212251039. The reversal of 1212251013 is 3101522121.

1212251013 is a `hidden beast` number, since 121 + 22 + 510 + 13 = 666.

It is not a de Polignac number, because 1212251013 - 2⁴ = 1212250997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212251003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1753998 + ... + 1754688.

It is an arithmetic number, because the mean of its divisors is an integer number (73398364).

Almost surely, 2^1212251013 is an apocalyptic number.

It is an amenable number.

1212251013 is a deficient number, since it is larger than the sum of its proper divisors (549309723).

1212251013 is a wasteful number, since it uses less digits than its factorization.

1212251013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1585 (or 1582 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1212251013 is about 34817.3952644364. The cubic root of 1212251013 is about 1066.2626220465.

Adding to 1212251013 its reverse (3101522121), we get a palindrome (4313773134).

The spelling of 1212251013 in words is "one billion, two hundred twelve million, two hundred fifty-one thousand, thirteen".