1212420015 has 32 divisors (see below), whose sum is σ = 2157105600. Its totient is φ = 646116480.

The previous prime is 1212419981. The next prime is 1212420019. The reversal of 1212420015 is 5100242121.

It is not a de Polignac number, because 1212420015 - 2⁸ = 1212419759 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1212420015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212420019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 222625 + ... + 228005.

It is an arithmetic number, because the mean of its divisors is an integer number (67409550).

Almost surely, 2^1212420015 is an apocalyptic number.

1212420015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1212420015 is a deficient number, since it is larger than the sum of its proper divisors (944685585).

1212420015 is a wasteful number, since it uses less digits than its factorization.

1212420015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7064 (or 7058 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1212420015 is about 34819.8221563523. The cubic root of 1212420015 is about 1066.3121695798.

Adding to 1212420015 its reverse (5100242121), we get a palindrome (6312662136).

The spelling of 1212420015 in words is "one billion, two hundred twelve million, four hundred twenty thousand, fifteen".