1211113029 has 16 divisors (see below), whose sum is σ = 1942638080. Its totient is φ = 655639920.

The previous prime is 1211113027. The next prime is 1211113039. The reversal of 1211113029 is 9203111121.

It is a happy number.

It is not a de Polignac number, because 1211113029 - 2¹ = 1211113027 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211112996 and 1211113014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211113027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1517287 + ... + 1518084.

It is an arithmetic number, because the mean of its divisors is an integer number (121414880).

Almost surely, 2^1211113029 is an apocalyptic number.

1211113029 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1211113029 is a deficient number, since it is larger than the sum of its proper divisors (731525051).

1211113029 is a wasteful number, since it uses less digits than its factorization.

1211113029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3035400.

The product of its (nonzero) digits is 108, while the sum is 21.

The square root of 1211113029 is about 34801.0492514234. The cubic root of 1211113029 is about 1065.9288711227.

The spelling of 1211113029 in words is "one billion, two hundred eleven million, one hundred thirteen thousand, twenty-nine".