1221114556 has 24 divisors (see below), whose sum is σ = 2265792480. Its totient is φ = 573844992.

The previous prime is 1221114533. The next prime is 1221114569. The reversal of 1221114556 is 6554111221.

It is a super-2 number, since 2×1221114556² = 2982241517750154272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38440 + ... + 62608.

It is an arithmetic number, because the mean of its divisors is an integer number (94408020).

Almost surely, 2^1221114556 is an apocalyptic number.

It is an amenable number.

1221114556 is a deficient number, since it is larger than the sum of its proper divisors (1044677924).

1221114556 is a wasteful number, since it uses less digits than its factorization.

1221114556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24933 (or 24931 counting only the distinct ones).

The product of its digits is 2400, while the sum is 28.

The square root of 1221114556 is about 34944.4495735732. The cubic root of 1221114556 is about 1068.8550235199.

Adding to 1221114556 its reverse (6554111221), we get a palindrome (7775225777).

The spelling of 1221114556 in words is "one billion, two hundred twenty-one million, one hundred fourteen thousand, five hundred fifty-six".