1222221232021 has 8 divisors (see below), whose sum is σ = 1229784401664. Its totient is φ = 1214658853920.

The previous prime is 1222221232003. The next prime is 1222221232091. The reversal of 1222221232021 is 1202321222221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1222221232021 - 2²³ = 1222212843413 is a prime.

It is a super-2 number, since 2×1222221232021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222221231983 and 1222221232001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222221232091) 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, 3065820 + ... + 3441466.

It is an arithmetic number, because the mean of its divisors is an integer number (153723050208).

Almost surely, 2^{1222221232021} is an apocalyptic number.

It is an amenable number.

1222221232021 is a deficient number, since it is larger than the sum of its proper divisors (7563169643).

1222221232021 is a wasteful number, since it uses less digits than its factorization.

1222221232021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395771.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 1222221232021 its reverse (1202321222221), we get a palindrome (2424542454242).

The spelling of 1222221232021 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred thirty-two thousand, twenty-one".