1211011434 has 48 divisors (see below), whose sum is σ = 2655005184. Its totient is φ = 398908800.

The previous prime is 1211011427. The next prime is 1211011441. The reversal of 1211011434 is 4341101121.

It is an interprime number because it is at equal distance from previous prime (1211011427) and next prime (1211011441).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 559314 + ... + 561474.

It is an arithmetic number, because the mean of its divisors is an integer number (55312608).

Almost surely, 2^1211011434 is an apocalyptic number.

1211011434 is an abundant number, since it is smaller than the sum of its proper divisors (1443993750).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211011434 is a wasteful number, since it uses less digits than its factorization.

1211011434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2523 (or 2520 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1211011434 is about 34799.5895665452. The cubic root of 1211011434 is about 1065.8990649116.

Adding to 1211011434 its reverse (4341101121), we get a palindrome (5552112555).

The spelling of 1211011434 in words is "one billion, two hundred eleven million, eleven thousand, four hundred thirty-four".