1211240013 has 8 divisors (see below), whose sum is σ = 1670676000. Its totient is φ = 779648688.

The previous prime is 1211239957. The next prime is 1211240027. The reversal of 1211240013 is 3100421121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1211240013 - 2¹⁰ = 1211238989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1211239974 and 1211240001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211240033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6961063 + ... + 6961236.

It is an arithmetic number, because the mean of its divisors is an integer number (208834500).

Almost surely, 2^1211240013 is an apocalyptic number.

It is an amenable number.

1211240013 is a deficient number, since it is larger than the sum of its proper divisors (459435987).

1211240013 is a wasteful number, since it uses less digits than its factorization.

1211240013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13922331.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1211240013 is about 34802.8736313541. The cubic root of 1211240013 is about 1065.9661236825.

Adding to 1211240013 its reverse (3100421121), we get a palindrome (4311661134).

It can be divided in two parts, 12112 and 40013, that added together give a palindrome (52125).

The spelling of 1211240013 in words is "one billion, two hundred eleven million, two hundred forty thousand, thirteen".