1221125270 has 8 divisors (see below), whose sum is σ = 2198025504. Its totient is φ = 488450104.

The previous prime is 1221125261. The next prime is 1221125281. The reversal of 1221125270 is 725211221.

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

It is a super-2 number, since 2×1221125270² = 2982293850065145800, which contains 22 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 3 ways as a sum of consecutive naturals, for example, 61056254 + ... + 61056273.

It is an arithmetic number, because the mean of its divisors is an integer number (274753188).

Almost surely, 2^1221125270 is an apocalyptic number.

1221125270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221125270 is a deficient number, since it is larger than the sum of its proper divisors (976900234).

1221125270 is a wasteful number, since it uses less digits than its factorization.

1221125270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122112534.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 1221125270 is about 34944.6028736914. The cubic root of 1221125270 is about 1068.8581495381.

Adding to 1221125270 its reverse (725211221), we get a palindrome (1946336491).

The spelling of 1221125270 in words is "one billion, two hundred twenty-one million, one hundred twenty-five thousand, two hundred seventy".