1211211092 has 48 divisors (see below), whose sum is σ = 2617343232. Its totient is φ = 477584640.

The previous prime is 1211211077. The next prime is 1211211203. The reversal of 1211211092 is 2901121121.

It is a super-4 number, since 4×1211211092⁴ (a number of 37 digits) contains 4444 as substring.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 108617 + ... + 119247.

It is an arithmetic number, because the mean of its divisors is an integer number (54527984).

Almost surely, 2^1211211092 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211211092, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1308671616).

1211211092 is an abundant number, since it is smaller than the sum of its proper divisors (1406132140).

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

1211211092 is a wasteful number, since it uses less digits than its factorization.

1211211092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10968 (or 10966 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 1211211092 is about 34802.4581315746. The cubic root of 1211211092 is about 1065.9576395254.

The spelling of 1211211092 in words is "one billion, two hundred eleven million, two hundred eleven thousand, ninety-two".