1201512013 has 4 divisors (see below), whose sum is σ = 1293936028. Its totient is φ = 1109088000.

The previous prime is 1201512001. The next prime is 1201512017. The reversal of 1201512013 is 3102151021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3102151021 = 43 ⋅72143047.

It can be written as a sum of positive squares in 2 ways, for example, as 211906249 + 989605764 = 14557^2 + 31458^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201512013 - 2⁹ = 1201511501 is a prime.

It is a super-2 number, since 2×1201512013² = 2887262234766624338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201512017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46211988 + ... + 46212013.

It is an arithmetic number, because the mean of its divisors is an integer number (323484007).

Almost surely, 2^1201512013 is an apocalyptic number.

1201512013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1201512013 is a deficient number, since it is larger than the sum of its proper divisors (92424015).

1201512013 is an equidigital number, since it uses as much as digits as its factorization.

1201512013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92424014.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 1201512013 is about 34662.8333088915. The cubic root of 1201512013 is about 1063.1047022940.

Adding to 1201512013 its reverse (3102151021), we get a palindrome (4303663034).

The spelling of 1201512013 in words is "one billion, two hundred one million, five hundred twelve thousand, thirteen".