1220122021 has 8 divisors (see below), whose sum is σ = 1246719744. Its totient is φ = 1193550960.

The previous prime is 1220122003. The next prime is 1220122039. The reversal of 1220122021 is 1202210221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1220122003) and next prime (1220122039).

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 1220122021 - 2¹⁷ = 1219990949 is a prime.

It is a super-2 number, since 2×1220122021² = 2977395492258248882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220121992 and 1220122010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220122051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106456 + ... + 117358.

It is an arithmetic number, because the mean of its divisors is an integer number (155839968).

Almost surely, 2^1220122021 is an apocalyptic number.

It is an amenable number.

1220122021 is a deficient number, since it is larger than the sum of its proper divisors (26597723).

1220122021 is a wasteful number, since it uses less digits than its factorization.

1220122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13331.

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

The square root of 1220122021 is about 34930.2450750063. The cubic root of 1220122021 is about 1068.5653527499.

Adding to 1220122021 its reverse (1202210221), we get a palindrome (2422332242).

The spelling of 1220122021 in words is "one billion, two hundred twenty million, one hundred twenty-two thousand, twenty-one".