1211211013 has 8 divisors (see below), whose sum is σ = 1293396480. Its totient is φ = 1131720240.

The previous prime is 1211211011. The next prime is 1211211041. The reversal of 1211211013 is 3101121121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1211211013 - 2¹ = 1211211011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211210984 and 1211211002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211211011) 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, 672745 + ... + 674542.

It is an arithmetic number, because the mean of its divisors is an integer number (161674560).

Almost surely, 2^1211211013 is an apocalyptic number.

It is an amenable number.

1211211013 is a deficient number, since it is larger than the sum of its proper divisors (82185467).

1211211013 is a wasteful number, since it uses less digits than its factorization.

1211211013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347347.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1211211013 is about 34802.4569965972. The cubic root of 1211211013 is about 1065.9576163501.

Adding to 1211211013 its reverse (3101121121), we get a palindrome (4312332134).

The spelling of 1211211013 in words is "one billion, two hundred eleven million, two hundred eleven thousand, thirteen".