1222020121021 has 4 divisors (see below), whose sum is σ = 1396594424032. Its totient is φ = 1047445818012.

The previous prime is 1222020121013. The next prime is 1222020121051. The reversal of 1222020121021 is 1201210202221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1222020121021 - 2³ = 1222020121013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222020120986 and 1222020121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222020121001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87287151495 + ... + 87287151508.

It is an arithmetic number, because the mean of its divisors is an integer number (349148606008).

Almost surely, 2^{1222020121021} is an apocalyptic number.

It is an amenable number.

1222020121021 is a deficient number, since it is larger than the sum of its proper divisors (174574303011).

1222020121021 is an equidigital number, since it uses as much as digits as its factorization.

1222020121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174574303010.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1222020121021 its reverse (1201210202221), we get a palindrome (2423230323242).

The spelling of 1222020121021 in words is "one trillion, two hundred twenty-two billion, twenty million, one hundred twenty-one thousand, twenty-one".