1221350522 has 16 divisors (see below), whose sum is σ = 2095009920. Its totient is φ = 523119408.

The previous prime is 1221350521. The next prime is 1221350527. The reversal of 1221350522 is 2250531221.

It is not an unprimeable number, because it can be changed into a prime (1221350521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1598 + ... + 49449.

It is an arithmetic number, because the mean of its divisors is an integer number (130938120).

Almost surely, 2^1221350522 is an apocalyptic number.

1221350522 is a deficient number, since it is larger than the sum of its proper divisors (873659398).

1221350522 is a wasteful number, since it uses less digits than its factorization.

1221350522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52765.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1221350522 is about 34947.8257120525. The cubic root of 1221350522 is about 1068.9238669654.

Adding to 1221350522 its reverse (2250531221), we get a palindrome (3471881743).

The spelling of 1221350522 in words is "one billion, two hundred twenty-one million, three hundred fifty thousand, five hundred twenty-two".