1214442542221 has 4 divisors (see below), whose sum is σ = 1214455236444. Its totient is φ = 1214429848000.

The previous prime is 1214442542219. The next prime is 1214442542263. The reversal of 1214442542221 is 1222452444121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53123796196 + 1161318746025 = 230486^2 + 1077645^2 .

It is a cyclic number.

It is not a de Polignac number, because 1214442542221 - 2¹ = 1214442542219 is a prime.

It is a super-2 number, since 2×1214442542221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1214442542321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6202510 + ... + 6395311.

It is an arithmetic number, because the mean of its divisors is an integer number (303613809111).

Almost surely, 2^{1214442542221} is an apocalyptic number.

It is an amenable number.

1214442542221 is a deficient number, since it is larger than the sum of its proper divisors (12694223).

1214442542221 is an equidigital number, since it uses as much as digits as its factorization.

1214442542221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12694222.

The product of its digits is 40960, while the sum is 34.

Adding to 1214442542221 its reverse (1222452444121), we get a palindrome (2436894986342).

The spelling of 1214442542221 in words is "one trillion, two hundred fourteen billion, four hundred forty-two million, five hundred forty-two thousand, two hundred twenty-one".