1222122021221 has 8 divisors (see below), whose sum is σ = 1222605082560. Its totient is φ = 1221639041952.

The previous prime is 1222122021209. The next prime is 1222122021229. The reversal of 1222122021221 is 1221202212221.

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 1222122021221 - 2⁶ = 1222122021157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222122021193 and 1222122021202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222122021229) 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, 64793690 + ... + 64812548.

It is an arithmetic number, because the mean of its divisors is an integer number (152825635320).

Almost surely, 2^{1222122021221} is an apocalyptic number.

It is an amenable number.

1222122021221 is a deficient number, since it is larger than the sum of its proper divisors (483061339).

1222122021221 is a wasteful number, since it uses less digits than its factorization.

1222122021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41035.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 1222122021221 its reverse (1221202212221), we get a palindrome (2443324233442).

The spelling of 1222122021221 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-two million, twenty-one thousand, two hundred twenty-one".