1223210002021 has 12 divisors (see below), whose sum is σ = 1422950818080. Its totient is φ = 1048441355640.

The previous prime is 1223210002009. The next prime is 1223210002037. The reversal of 1223210002021 is 1202000123221.

It is a happy number.

It is not a de Polignac number, because 1223210002021 - 2³⁹ = 673454188133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1223210001986 and 1223210002004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223210002081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2027536 + ... + 2560726.

It is an arithmetic number, because the mean of its divisors is an integer number (118579234840).

Almost surely, 2^{1223210002021} is an apocalyptic number.

It is an amenable number.

1223210002021 is a deficient number, since it is larger than the sum of its proper divisors (199740816059).

1223210002021 is an equidigital number, since it uses as much as digits as its factorization.

1223210002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580024 (or 580017 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 1223210002021 its reverse (1202000123221), we get a palindrome (2425210125242).

The spelling of 1223210002021 in words is "one trillion, two hundred twenty-three billion, two hundred ten million, two thousand, twenty-one".