1221125354 has 8 divisors (see below), whose sum is σ = 1832495808. Its totient is φ = 610293420.

The previous prime is 1221125333. The next prime is 1221125363. The reversal of 1221125354 is 4535211221.

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

It is a super-2 number, since 2×1221125354² = 2982294260363250632, which contains 22 as substring.

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, 128912 + ... + 138059.

It is an arithmetic number, because the mean of its divisors is an integer number (229061976).

Almost surely, 2^1221125354 is an apocalyptic number.

1221125354 is a deficient number, since it is larger than the sum of its proper divisors (611370454).

1221125354 is a wasteful number, since it uses less digits than its factorization.

1221125354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269260.

The product of its digits is 2400, while the sum is 26.

The square root of 1221125354 is about 34944.6040755937. The cubic root of 1221125354 is about 1068.8581740467.

Adding to 1221125354 its reverse (4535211221), we get a palindrome (5756336575).

The spelling of 1221125354 in words is "one billion, two hundred twenty-one million, one hundred twenty-five thousand, three hundred fifty-four".