1210220122021 has 8 divisors (see below), whose sum is σ = 1210772642040. Its totient is φ = 1209667704768.

The previous prime is 1210220121989. The next prime is 1210220122061. The reversal of 1210220122021 is 1202210220121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8534988225 + 1201685133796 = 92385^2 + 1096214^2 .

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 1210220122021 - 2⁵ = 1210220121989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210220121986 and 1210220122004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210220122061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32239155 + ... + 32276671.

It is an arithmetic number, because the mean of its divisors is an integer number (151346580255).

Almost surely, 2^{1210220122021} is an apocalyptic number.

It is an amenable number.

1210220122021 is a deficient number, since it is larger than the sum of its proper divisors (552520019).

1210220122021 is a wasteful number, since it uses less digits than its factorization.

1210220122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51383.

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

Adding to 1210220122021 its reverse (1202210220121), we get a palindrome (2412430342142).

The spelling of 1210220122021 in words is "one trillion, two hundred ten billion, two hundred twenty million, one hundred twenty-two thousand, twenty-one".