1211012013 has 16 divisors (see below), whose sum is σ = 1625697216. Its totient is φ = 801853440.

The previous prime is 1211011951. The next prime is 1211012021. The reversal of 1211012013 is 3102101121.

It is not a de Polignac number, because 1211012013 - 2¹⁰ = 1211010989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1211012013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211012083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285478 + ... + 289688.

It is an arithmetic number, because the mean of its divisors is an integer number (101606076).

Almost surely, 2^1211012013 is an apocalyptic number.

It is an amenable number.

1211012013 is a deficient number, since it is larger than the sum of its proper divisors (414685203).

1211012013 is a wasteful number, since it uses less digits than its factorization.

1211012013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4844.

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

The square root of 1211012013 is about 34799.5978856078. The cubic root of 1211012013 is about 1065.8992347849.

Adding to 1211012013 its reverse (3102101121), we get a palindrome (4313113134).

The spelling of 1211012013 in words is "one billion, two hundred eleven million, twelve thousand, thirteen".