1221113254 has 8 divisors (see below), whose sum is σ = 1834150680. Its totient is φ = 609729696.

The previous prime is 1221113221. The next prime is 1221113273. The reversal of 1221113254 is 4523111221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1221113254² = 2982235158188937032, 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 3 ways as a sum of consecutive naturals, for example, 411619 + ... + 414574.

It is an arithmetic number, because the mean of its divisors is an integer number (229268835).

Almost surely, 2^1221113254 is an apocalyptic number.

1221113254 is a deficient number, since it is larger than the sum of its proper divisors (613037426).

1221113254 is an equidigital number, since it uses as much as digits as its factorization.

1221113254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826934.

The product of its digits is 480, while the sum is 22.

The square root of 1221113254 is about 34944.4309440002. The cubic root of 1221113254 is about 1068.8546436347.

Adding to 1221113254 its reverse (4523111221), we get a palindrome (5744224475).

The spelling of 1221113254 in words is "one billion, two hundred twenty-one million, one hundred thirteen thousand, two hundred fifty-four".