1220120122021 has 8 divisors (see below), whose sum is σ = 1237350643200. Its totient is φ = 1202890871280.

The previous prime is 1220120122019. The next prime is 1220120122027. The reversal of 1220120122021 is 1202210210221.

It is a happy number.

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 1220120122021 - 2¹ = 1220120122019 is a prime.

It is a super-2 number, since 2×1220120122021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220120121986 and 1220120122004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220120122027) 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, 1707235 + ... + 2314063.

It is an arithmetic number, because the mean of its divisors is an integer number (154668830400).

Almost surely, 2^{1220120122021} is an apocalyptic number.

It is an amenable number.

1220120122021 is a deficient number, since it is larger than the sum of its proper divisors (17230521179).

1220120122021 is an equidigital number, since it uses as much as digits as its factorization.

1220120122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635219.

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

Adding to 1220120122021 its reverse (1202210210221), we get a palindrome (2422330332242).

The spelling of 1220120122021 in words is "one trillion, two hundred twenty billion, one hundred twenty million, one hundred twenty-two thousand, twenty-one".