1221022221023 has 8 divisors (see below), whose sum is σ = 1332211224960. Its totient is φ = 1109864381080.

The previous prime is 1221022220983. The next prime is 1221022221049. The reversal of 1221022221023 is 3201222201221.

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 1221022221023 - 2²⁰ = 1221021172447 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221022220986 and 1221022221004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221022221623) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7709033 + ... + 7865826.

It is an arithmetic number, because the mean of its divisors is an integer number (166526403120).

Almost surely, 2^{1221022221023} is an apocalyptic number.

1221022221023 is a deficient number, since it is larger than the sum of its proper divisors (111189003937).

1221022221023 is a wasteful number, since it uses less digits than its factorization.

1221022221023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15581997.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 1221022221023 its reverse (3201222201221), we get a palindrome (4422244422244).

The spelling of 1221022221023 in words is "one trillion, two hundred twenty-one billion, twenty-two million, two hundred twenty-one thousand, twenty-three".