202122066145 has 4 divisors (see below), whose sum is σ = 242546479380. Its totient is φ = 161697652912.

The previous prime is 202122066143. The next prime is 202122066149. The reversal of 202122066145 is 541660221202.

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 32463751329 + 169658314816 = 180177^2 + 411896^2 .

It is a cyclic number.

It is not a de Polignac number, because 202122066145 - 2¹ = 202122066143 is a prime.

It is a super-2 number, since 2×202122066145² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (202122066143) 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, 20212206610 + ... + 20212206619.

It is an arithmetic number, because the mean of its divisors is an integer number (60636619845).

Almost surely, 2^202122066145 is an apocalyptic number.

It is an amenable number.

202122066145 is a deficient number, since it is larger than the sum of its proper divisors (40424413235).

202122066145 is an equidigital number, since it uses as much as digits as its factorization.

202122066145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40424413234.

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 202122066145 its reverse (541660221202), we get a palindrome (743782287347).

The spelling of 202122066145 in words is "two hundred two billion, one hundred twenty-two million, sixty-six thousand, one hundred forty-five".