1401442334221 has 4 divisors (see below), whose sum is σ = 1401663492892. Its totient is φ = 1401221175552.

The previous prime is 1401442334183. The next prime is 1401442334249. The reversal of 1401442334221 is 1224332441041.

It is a happy number.

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 540232350025 + 861209984196 = 735005^2 + 928014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1401442334221 is a prime.

It is a super-2 number, since 2×1401442334221² (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 (1401442334261) 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, 110569830 + ... + 110582503.

It is an arithmetic number, because the mean of its divisors is an integer number (350415873223).

Almost surely, 2^{1401442334221} is an apocalyptic number.

It is an amenable number.

1401442334221 is a deficient number, since it is larger than the sum of its proper divisors (221158671).

1401442334221 is an equidigital number, since it uses as much as digits as its factorization.

1401442334221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221158670.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 1401442334221 its reverse (1224332441041), we get a palindrome (2625774775262).

The spelling of 1401442334221 in words is "one trillion, four hundred one billion, four hundred forty-two million, three hundred thirty-four thousand, two hundred twenty-one".