202102311445 has 4 divisors (see below), whose sum is σ = 242522773740. Its totient is φ = 161681849152.

The previous prime is 202102311401. The next prime is 202102311473. The reversal of 202102311445 is 544113201202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 544113201202 = 2 ⋅272056600601.

It can be written as a sum of positive squares in 2 ways, for example, as 70564078321 + 131538233124 = 265639^2 + 362682^2 .

It is a cyclic number.

It is not a de Polignac number, because 202102311445 - 2²¹ = 202100214293 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20210231140 + ... + 20210231149.

It is an arithmetic number, because the mean of its divisors is an integer number (60630693435).

Almost surely, 2^202102311445 is an apocalyptic number.

It is an amenable number.

202102311445 is a deficient number, since it is larger than the sum of its proper divisors (40420462295).

202102311445 is an equidigital number, since it uses as much as digits as its factorization.

202102311445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40420462294.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 202102311445 its reverse (544113201202), we get a palindrome (746215512647).

The spelling of 202102311445 in words is "two hundred two billion, one hundred two million, three hundred eleven thousand, four hundred forty-five".