31321202141 has 4 divisors (see below), whose sum is σ = 31321588284. Its totient is φ = 31320816000.

The previous prime is 31321202117. The next prime is 31321202161. The reversal of 31321202141 is 14120212313.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 14120212313 = 1489 ⋅9483017.

It can be written as a sum of positive squares in 2 ways, for example, as 4572599641 + 26748602500 = 67621^2 + 163550^2 .

It is a cyclic number.

It is not a de Polignac number, because 31321202141 - 2¹⁸ = 31320939997 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 (31321202111) 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, 19220 + ... + 251021.

It is an arithmetic number, because the mean of its divisors is an integer number (7830397071).

Almost surely, 2^31321202141 is an apocalyptic number.

It is an amenable number.

31321202141 is a deficient number, since it is larger than the sum of its proper divisors (386143).

31321202141 is a wasteful number, since it uses less digits than its factorization.

31321202141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386142.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 31321202141 its reverse (14120212313), we get a palindrome (45441414454).

The spelling of 31321202141 in words is "thirty-one billion, three hundred twenty-one million, two hundred two thousand, one hundred forty-one".