1221052422 has 32 divisors (see below), whose sum is σ = 2465280000. Its totient is φ = 403165728.

The previous prime is 1221052409. The next prime is 1221052463. The reversal of 1221052422 is 2242501221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 813829 + ... + 815327.

It is an arithmetic number, because the mean of its divisors is an integer number (77040000).

Almost surely, 2^1221052422 is an apocalyptic number.

1221052422 is an abundant number, since it is smaller than the sum of its proper divisors (1244227578).

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

1221052422 is a wasteful number, since it uses less digits than its factorization.

1221052422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2700.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 1221052422 is about 34943.5605226485. The cubic root of 1221052422 is about 1068.8368943541.

Adding to 1221052422 its reverse (2242501221), we get a palindrome (3463553643).

The spelling of 1221052422 in words is "one billion, two hundred twenty-one million, fifty-two thousand, four hundred twenty-two".