31223001011 has 8 divisors (see below), whose sum is σ = 32241782784. Its totient is φ = 30204943560.

The previous prime is 31223000993. The next prime is 31223001049. The reversal of 31223001011 is 11010032213.

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 31223001011 - 2²⁶ = 31155892147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31223001071) 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, 92771 + ... + 266556.

It is an arithmetic number, because the mean of its divisors is an integer number (4030222848).

Almost surely, 2^31223001011 is an apocalyptic number.

31223001011 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

31223001011 is a deficient number, since it is larger than the sum of its proper divisors (1018781773).

31223001011 is a wasteful number, since it uses less digits than its factorization.

31223001011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362161.

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

Adding to 31223001011 its reverse (11010032213), we get a palindrome (42233033224).

The spelling of 31223001011 in words is "thirty-one billion, two hundred twenty-three million, one thousand, eleven".