1221010202022 has 96 divisors (see below), whose sum is σ = 2690538145920. Its totient is φ = 369156902400.

The previous prime is 1221010202011. The next prime is 1221010202051. The reversal of 1221010202022 is 2202020101221.

It is a junction number, because it is equal to n+sod(n) for n = 1221010201992 and 1221010202010.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27220729 + ... + 27265547.

It is an arithmetic number, because the mean of its divisors is an integer number (28026439020).

Almost surely, 2^{1221010202022} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1221010202022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1345269072960).

1221010202022 is an abundant number, since it is smaller than the sum of its proper divisors (1469527943898).

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

1221010202022 is a wasteful number, since it uses less digits than its factorization.

1221010202022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45318 (or 45305 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1221010202022 its reverse (2202020101221), we get a palindrome (3423030303243).

The spelling of 1221010202022 in words is "one trillion, two hundred twenty-one billion, ten million, two hundred two thousand, twenty-two".