31100420123 has 8 divisors (see below), whose sum is σ = 32817334800. Its totient is φ = 29391510528.

The previous prime is 31100420111. The next prime is 31100420201. The reversal of 31100420123 is 32102400113.

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 31100420123 - 2⁶ = 31100420059 is a prime.

It is a super-2 number, since 2×31100420123² (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 (31100420423) 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 7 ways as a sum of consecutive naturals, for example, 1993286 + ... + 2008827.

It is an arithmetic number, because the mean of its divisors is an integer number (4102166850).

Almost surely, 2^31100420123 is an apocalyptic number.

31100420123 is a deficient number, since it is larger than the sum of its proper divisors (1716914677).

31100420123 is a wasteful number, since it uses less digits than its factorization.

31100420123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4002541.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31100420123 its reverse (32102400113), we get a palindrome (63202820236).

The spelling of 31100420123 in words is "thirty-one billion, one hundred million, four hundred twenty thousand, one hundred twenty-three".