1221083134 has 16 divisors (see below), whose sum is σ = 1862562816. Its totient is φ = 600276600.

The previous prime is 1221083131. The next prime is 1221083159. The reversal of 1221083134 is 4313801221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1221083099 and 1221083108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221083131) 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, 40399 + ... + 63829.

It is an arithmetic number, because the mean of its divisors is an integer number (116410176).

Almost surely, 2^1221083134 is an apocalyptic number.

1221083134 is a deficient number, since it is larger than the sum of its proper divisors (641479682).

1221083134 is a wasteful number, since it uses less digits than its factorization.

1221083134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23871.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1221083134 is about 34943.9999713828. Note that the first 4 decimals coincide. The cubic root of 1221083134 is about 1068.8458554336.

Adding to 1221083134 its reverse (4313801221), we get a palindrome (5534884355).

The spelling of 1221083134 in words is "one billion, two hundred twenty-one million, eighty-three thousand, one hundred thirty-four".