31142140201 has 4 divisors (see below), whose sum is σ = 31170790912. Its totient is φ = 31113489492.

The previous prime is 31142140199. The next prime is 31142140213. The reversal of 31142140201 is 10204124113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10204124113 = 263 ⋅38798951.

It is a cyclic number.

It is not a de Polignac number, because 31142140201 - 2¹ = 31142140199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31142140241) 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, 14323725 + ... + 14325898.

It is an arithmetic number, because the mean of its divisors is an integer number (7792697728).

Almost surely, 2^31142140201 is an apocalyptic number.

It is an amenable number.

31142140201 is a deficient number, since it is larger than the sum of its proper divisors (28650711).

31142140201 is a wasteful number, since it uses less digits than its factorization.

31142140201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28650710.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 31142140201 its reverse (10204124113), we get a palindrome (41346264314).

The spelling of 31142140201 in words is "thirty-one billion, one hundred forty-two million, one hundred forty thousand, two hundred one".