1240211213 has 4 divisors (see below), whose sum is σ = 1251802080. Its totient is φ = 1228620348.

The previous prime is 1240211197. The next prime is 1240211239. The reversal of 1240211213 is 3121120421.

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.

It is a cyclic number.

It is not a de Polignac number, because 1240211213 - 2⁴ = 1240211197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1240211191 and 1240211200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240211293) 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, 5795273 + ... + 5795486.

It is an arithmetic number, because the mean of its divisors is an integer number (312950520).

Almost surely, 2^1240211213 is an apocalyptic number.

It is an amenable number.

1240211213 is a deficient number, since it is larger than the sum of its proper divisors (11590867).

1240211213 is a wasteful number, since it uses less digits than its factorization.

1240211213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11590866.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1240211213 is about 35216.6326186931. The cubic root of 1240211213 is about 1074.3980659012.

Adding to 1240211213 its reverse (3121120421), we get a palindrome (4361331634).

The spelling of 1240211213 in words is "one billion, two hundred forty million, two hundred eleven thousand, two hundred thirteen".