1212145015 has 16 divisors (see below), whose sum is σ = 1476679680. Its totient is φ = 955009440.

The previous prime is 1212145009. The next prime is 1212145079. The reversal of 1212145015 is 5105412121.

It is not a de Polignac number, because 1212145015 - 2⁷ = 1212144887 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 555196 + ... + 557374.

It is an arithmetic number, because the mean of its divisors is an integer number (92292480).

Almost surely, 2^1212145015 is an apocalyptic number.

1212145015 is a deficient number, since it is larger than the sum of its proper divisors (264534665).

1212145015 is a wasteful number, since it uses less digits than its factorization.

1212145015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3822.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 1212145015 is about 34815.8730322823. The cubic root of 1212145015 is about 1066.2315434996.

Adding to 1212145015 its reverse (5105412121), we get a palindrome (6317557136).

The spelling of 1212145015 in words is "one billion, two hundred twelve million, one hundred forty-five thousand, fifteen".