1222120122021 has 40 divisors (see below), whose sum is σ = 1842556752960. Its totient is φ = 807227275392.

The previous prime is 1222120121987. The next prime is 1222120122059. The reversal of 1222120122021 is 1202210212221.

It is a happy number.

1222120122021 is a `hidden beast` number, since 1 + 2 + 221 + 201 + 220 + 21 = 666.

It is not a de Polignac number, because 1222120122021 - 2¹⁰ = 1222120120997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222120121985 and 1222120122003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222120122061) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4005645 + ... + 4299933.

It is an arithmetic number, because the mean of its divisors is an integer number (46063918824).

Almost surely, 2^{1222120122021} is an apocalyptic number.

It is an amenable number.

1222120122021 is a deficient number, since it is larger than the sum of its proper divisors (620436630939).

1222120122021 is a wasteful number, since it uses less digits than its factorization.

1222120122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294775 (or 294766 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1222120122021 its reverse (1202210212221), we get a palindrome (2424330334242).

The spelling of 1222120122021 in words is "one trillion, two hundred twenty-two billion, one hundred twenty million, one hundred twenty-two thousand, twenty-one".