1210222002221 has 8 divisors (see below), whose sum is σ = 1212818082840. Its totient is φ = 1207628693568.

The previous prime is 1210222002211. The next prime is 1210222002263. The reversal of 1210222002221 is 1222002220121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 570999366025 + 639222636196 = 755645^2 + 799514^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1210222002221 is a prime.

It is a super-2 number, since 2×1210222002221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1210222002221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210222002211) 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, 182315 + ... + 1566423.

It is an arithmetic number, because the mean of its divisors is an integer number (151602260355).

Almost surely, 2^{1210222002221} is an apocalyptic number.

It is an amenable number.

1210222002221 is a deficient number, since it is larger than the sum of its proper divisors (2596080619).

1210222002221 is an equidigital number, since it uses as much as digits as its factorization.

1210222002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385983.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1210222002221 its reverse (1222002220121), we get a palindrome (2432224222342).

The spelling of 1210222002221 in words is "one trillion, two hundred ten billion, two hundred twenty-two million, two thousand, two hundred twenty-one".