1212420313 has 16 divisors (see below), whose sum is σ = 1363864320. Its totient is φ = 1070040384.

The previous prime is 1212420311. The next prime is 1212420337. The reversal of 1212420313 is 3130242121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1212420313 - 2¹ = 1212420311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212420311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23220 + ... + 54442.

It is an arithmetic number, because the mean of its divisors is an integer number (85241520).

Almost surely, 2^1212420313 is an apocalyptic number.

1212420313 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1212420313 is a deficient number, since it is larger than the sum of its proper divisors (151444007).

1212420313 is a wasteful number, since it uses less digits than its factorization.

1212420313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31368.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1212420313 is about 34819.8264355238. The cubic root of 1212420313 is about 1066.3122569425.

Adding to 1212420313 its reverse (3130242121), we get a palindrome (4342662434).

The spelling of 1212420313 in words is "one billion, two hundred twelve million, four hundred twenty thousand, three hundred thirteen".