1222120223121 has 16 divisors (see below), whose sum is σ = 1864905084800. Its totient is φ = 697369419648.

The previous prime is 1222120223117. The next prime is 1222120223153. The reversal of 1222120223121 is 1213220212221.

It is not a de Polignac number, because 1222120223121 - 2² = 1222120223117 is a prime.

It is a super-3 number, since 3×1222120223121³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222120223021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41026156 + ... + 41055933.

It is an arithmetic number, because the mean of its divisors is an integer number (116556567800).

Almost surely, 2^{1222120223121} is an apocalyptic number.

It is an amenable number.

1222120223121 is a deficient number, since it is larger than the sum of its proper divisors (642784861679).

1222120223121 is an equidigital number, since it uses as much as digits as its factorization.

1222120223121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82082808.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 1222120223121 its reverse (1213220212221), we get a palindrome (2435340435342).

The spelling of 1222120223121 in words is "one trillion, two hundred twenty-two billion, one hundred twenty million, two hundred twenty-three thousand, one hundred twenty-one".