31053112221 has 8 divisors (see below), whose sum is σ = 42414007104. Its totient is φ = 20197146080.

The previous prime is 31053112187. The next prime is 31053112231. The reversal of 31053112221 is 12221135013.

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 31053112221 - 2¹¹ = 31053110173 is a prime.

It is a super-2 number, since 2×31053112221² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31053112231) 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, 126232041 + ... + 126232286.

It is an arithmetic number, because the mean of its divisors is an integer number (5301750888).

Almost surely, 2^31053112221 is an apocalyptic number.

It is an amenable number.

31053112221 is a deficient number, since it is larger than the sum of its proper divisors (11360894883).

31053112221 is a wasteful number, since it uses less digits than its factorization.

31053112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252464371.

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 31053112221 its reverse (12221135013), we get a palindrome (43274247234).

The spelling of 31053112221 in words is "thirty-one billion, fifty-three million, one hundred twelve thousand, two hundred twenty-one".