31021230011 has 6 divisors (see below), whose sum is σ = 31491148500. Its totient is φ = 30558222156.

The previous prime is 31021229999. The next prime is 31021230041. The reversal of 31021230011 is 11003212013.

It is not a de Polignac number, because 31021230011 - 2¹⁸ = 31020967867 is a prime.

It is a super-2 number, since 2×31021230011² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31021230041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3450761 + ... + 3459738.

It is an arithmetic number, because the mean of its divisors is an integer number (5248524750).

Almost surely, 2^31021230011 is an apocalyptic number.

31021230011 is a deficient number, since it is larger than the sum of its proper divisors (469918489).

31021230011 is an frugal number, since it uses more digits than its factorization.

31021230011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6910633 (or 6910566 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 31021230011 its reverse (11003212013), we get a palindrome (42024442024).

The spelling of 31021230011 in words is "thirty-one billion, twenty-one million, two hundred thirty thousand, eleven".