1245212011 has 4 divisors (see below), whose sum is σ = 1257301552. Its totient is φ = 1233122472.

The previous prime is 1245212009. The next prime is 1245212021. The reversal of 1245212011 is 1102125421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1245212011 - 2¹ = 1245212009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1245212011.

It is not an unprimeable number, because it can be changed into a prime (1245212021) 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, 6044616 + ... + 6044821.

It is an arithmetic number, because the mean of its divisors is an integer number (314325388).

Almost surely, 2^1245212011 is an apocalyptic number.

1245212011 is a deficient number, since it is larger than the sum of its proper divisors (12089541).

1245212011 is a wasteful number, since it uses less digits than its factorization.

1245212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12089540.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 1245212011 is about 35287.5617038072. The cubic root of 1245212011 is about 1075.8401972318.

Adding to 1245212011 its reverse (1102125421), we get a palindrome (2347337432).

The spelling of 1245212011 in words is "one billion, two hundred forty-five million, two hundred twelve thousand, eleven".