31001342221 has 8 divisors (see below), whose sum is σ = 31950527840. Its totient is φ = 30062530512.

The previous prime is 31001342159. The next prime is 31001342237. The reversal of 31001342221 is 12224310013.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31001342221 - 2¹³ = 31001334029 is a prime.

It is a super-2 number, since 2×31001342221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31001342521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2587410 + ... + 2599363.

It is an arithmetic number, because the mean of its divisors is an integer number (3993815980).

Almost surely, 2^31001342221 is an apocalyptic number.

It is an amenable number.

31001342221 is a deficient number, since it is larger than the sum of its proper divisors (949185619).

31001342221 is a wasteful number, since it uses less digits than its factorization.

31001342221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5186955.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 31001342221 its reverse (12224310013), we get a palindrome (43225652234).

The spelling of 31001342221 in words is "thirty-one billion, one million, three hundred forty-two thousand, two hundred twenty-one".