1221022221022 has 32 divisors (see below), whose sum is σ = 1921502671200. Its totient is φ = 581155373568.

The previous prime is 1221022220983. The next prime is 1221022221049. The reversal of 1221022221022 is 2201222201221.

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, 1450378 + ... + 2132050.

It is an arithmetic number, because the mean of its divisors is an integer number (60046958475).

Almost surely, 2^{1221022221022} is an apocalyptic number.

1221022221022 is a deficient number, since it is larger than the sum of its proper divisors (700480450178).

1221022221022 is a wasteful number, since it uses less digits than its factorization.

1221022221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682140.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 1221022221022 its reverse (2201222201221), we get a palindrome (3422244422243).

The spelling of 1221022221022 in words is "one trillion, two hundred twenty-one billion, twenty-two million, two hundred twenty-one thousand, twenty-two".