162121207 has 4 divisors (see below), whose sum is σ = 162476416. Its totient is φ = 161766000.

The previous prime is 162121199. The next prime is 162121229. The reversal of 162121207 is 702121261.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 702121261 = 3257 ⋅215573.

It is a cyclic number.

It is not a de Polignac number, because 162121207 - 2³ = 162121199 is a prime.

It is a super-4 number, since 4×162121207⁴ (a number of 34 digits) contains 4444 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 (162121007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176919 + ... + 177832.

It is an arithmetic number, because the mean of its divisors is an integer number (40619104).

Almost surely, 2^162121207 is an apocalyptic number.

162121207 is a deficient number, since it is larger than the sum of its proper divisors (355209).

162121207 is an equidigital number, since it uses as much as digits as its factorization.

162121207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355208.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 162121207 is about 12732.6826317159. The cubic root of 162121207 is about 545.2720993493.

Adding to 162121207 its reverse (702121261), we get a palindrome (864242468).

The spelling of 162121207 in words is "one hundred sixty-two million, one hundred twenty-one thousand, two hundred seven".