31200022123 has 32 divisors (see below), whose sum is σ = 34959278592. Its totient is φ = 27692121600.

The previous prime is 31200022121. The next prime is 31200022141. The reversal of 31200022123 is 32122000213.

It is a cyclic number.

It is not a de Polignac number, because 31200022123 - 2¹ = 31200022121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31200022097 and 31200022106.

It is not an unprimeable number, because it can be changed into a prime (31200022121) 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 31 ways as a sum of consecutive naturals, for example, 26643328 + ... + 26644498.

It is an arithmetic number, because the mean of its divisors is an integer number (1092477456).

Almost surely, 2^31200022123 is an apocalyptic number.

31200022123 is a deficient number, since it is larger than the sum of its proper divisors (3759256469).

31200022123 is a wasteful number, since it uses less digits than its factorization.

31200022123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2115.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 31200022123 its reverse (32122000213), we get a palindrome (63322022336).

The spelling of 31200022123 in words is "thirty-one billion, two hundred million, twenty-two thousand, one hundred twenty-three".