1402131240221 has 4 divisors (see below), whose sum is σ = 1405735691100. Its totient is φ = 1398526789344.

The previous prime is 1402131240193. The next prime is 1402131240229. The reversal of 1402131240221 is 1220421312041.

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 433146943321 + 968984296900 = 658139^2 + 984370^2 .

It is a cyclic number.

It is not a de Polignac number, because 1402131240221 - 2⁶ = 1402131240157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1402131240229) 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, 1802224856 + ... + 1802225633.

It is an arithmetic number, because the mean of its divisors is an integer number (351433922775).

Almost surely, 2^{1402131240221} is an apocalyptic number.

It is an amenable number.

1402131240221 is a deficient number, since it is larger than the sum of its proper divisors (3604450879).

1402131240221 is an equidigital number, since it uses as much as digits as its factorization.

1402131240221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3604450878.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 1402131240221 its reverse (1220421312041), we get a palindrome (2622552552262).

The spelling of 1402131240221 in words is "one trillion, four hundred two billion, one hundred thirty-one million, two hundred forty thousand, two hundred twenty-one".