10202121331 has 4 divisors (see below), whose sum is σ = 10202323464. Its totient is φ = 10201919200.

The previous prime is 10202121313. The next prime is 10202121361. The reversal of 10202121331 is 13312120201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10202121331 - 2⁷ = 10202121203 is a prime.

It is a super-2 number, since 2×10202121331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10202121361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45291 + ... + 149851.

It is an arithmetic number, because the mean of its divisors is an integer number (2550580866).

Almost surely, 2^10202121331 is an apocalyptic number.

10202121331 is a deficient number, since it is larger than the sum of its proper divisors (202133).

10202121331 is an equidigital number, since it uses as much as digits as its factorization.

10202121331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202132.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 10202121331 its reverse (13312120201), we get a palindrome (23514241532).

The spelling of 10202121331 in words is "ten billion, two hundred two million, one hundred twenty-one thousand, three hundred thirty-one".