162232136221 has 4 divisors (see below), whose sum is σ = 162268836444. Its totient is φ = 162195436000.

The previous prime is 162232136201. The next prime is 162232136257. The reversal of 162232136221 is 122631232261.

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 148178033721 + 14054102500 = 384939^2 + 118550^2 .

It is a cyclic number.

It is not a de Polignac number, because 162232136221 - 2³⁷ = 24793182749 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 (162232136201) 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, 18343480 + ... + 18352321.

It is an arithmetic number, because the mean of its divisors is an integer number (40567209111).

Almost surely, 2^162232136221 is an apocalyptic number.

It is an amenable number.

162232136221 is a deficient number, since it is larger than the sum of its proper divisors (36700223).

162232136221 is an equidigital number, since it uses as much as digits as its factorization.

162232136221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36700222.

The product of its digits is 10368, while the sum is 31.

Adding to 162232136221 its reverse (122631232261), we get a palindrome (284863368482).

The spelling of 162232136221 in words is "one hundred sixty-two billion, two hundred thirty-two million, one hundred thirty-six thousand, two hundred twenty-one".