1212013 has 4 divisors (see below), whose sum is σ = 1322208. Its totient is φ = 1101820.

The previous prime is 1212011. The next prime is 1212017. The reversal of 1212013 is 3102121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3102121 = 11 ⋅282011.

It is a cyclic number.

It is not a de Polignac number, because 1212013 - 2¹ = 1212011 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212011) 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 3 ways as a sum of consecutive naturals, for example, 55081 + ... + 55102.

It is an arithmetic number, because the mean of its divisors is an integer number (330552).

2^1212013 is an apocalyptic number.

It is an amenable number.

1212013 is a deficient number, since it is larger than the sum of its proper divisors (110195).

1212013 is a wasteful number, since it uses less digits than its factorization.

1212013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110194.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1212013 is about 1100.9146197594. The cubic root of 1212013 is about 106.6192834251.

Adding to 1212013 its reverse (3102121), we get a palindrome (4314134).

The spelling of 1212013 in words is "one million, two hundred twelve thousand, thirteen".