1222020121 has 8 divisors (see below), whose sum is σ = 1416265344. Its totient is φ = 1032692640.

The previous prime is 1222020083. The next prime is 1222020133. The reversal of 1222020121 is 1210202221.

It is a happy number.

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

It is not a de Polignac number, because 1222020121 - 2¹⁹ = 1221495833 is a prime.

It is a super-2 number, since 2×1222020121² = 2986666352257709282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222020161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1228900 + ... + 1229893.

It is an arithmetic number, because the mean of its divisors is an integer number (177033168).

Almost surely, 2^1222020121 is an apocalyptic number.

It is an amenable number.

1222020121 is a deficient number, since it is larger than the sum of its proper divisors (194245223).

1222020121 is an equidigital number, since it uses as much as digits as its factorization.

1222020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2458871.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1222020121 is about 34957.4043801882. The cubic root of 1222020121 is about 1069.1191752402.

Adding to 1222020121 its reverse (1210202221), we get a palindrome (2432222342).

The spelling of 1222020121 in words is "one billion, two hundred twenty-two million, twenty thousand, one hundred twenty-one".