1226121270 has 64 divisors (see below), whose sum is σ = 3241465344. Its totient is φ = 294347520.

The previous prime is 1226121257. The next prime is 1226121313. The reversal of 1226121270 is 721216221.

It is a self number, because there is not a number n which added to its sum of digits gives 1226121270.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15954 + ... + 52026.

It is an arithmetic number, because the mean of its divisors is an integer number (50647896).

Almost surely, 2^1226121270 is an apocalyptic number.

1226121270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1226121270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1620732672).

1226121270 is an abundant number, since it is smaller than the sum of its proper divisors (2015344074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1226121270 is a wasteful number, since it uses less digits than its factorization.

1226121270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36197.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 1226121270 is about 35016.0144790923. The cubic root of 1226121270 is about 1070.3138421970.

Adding to 1226121270 its reverse (721216221), we get a palindrome (1947337491).

The spelling of 1226121270 in words is "one billion, two hundred twenty-six million, one hundred twenty-one thousand, two hundred seventy".