31220101323 has 8 divisors (see below), whose sum is σ = 46252002000. Its totient is φ = 20813400864.

The previous prime is 31220101301. The next prime is 31220101331. The reversal of 31220101323 is 32310102213.

31220101323 is a `hidden beast` number, since 312 + 20 + 10 + 1 + 323 = 666.

It is not a de Polignac number, because 31220101323 - 2⁵ = 31220101291 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31220101296 and 31220101305.

It is not an unprimeable number, because it can be changed into a prime (31220101373) 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, 578149998 + ... + 578150051.

It is an arithmetic number, because the mean of its divisors is an integer number (5781500250).

Almost surely, 2^31220101323 is an apocalyptic number.

31220101323 is a deficient number, since it is larger than the sum of its proper divisors (15031900677).

31220101323 is a wasteful number, since it uses less digits than its factorization.

31220101323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156300058 (or 1156300052 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31220101323 its reverse (32310102213), we get a palindrome (63530203536).

The spelling of 31220101323 in words is "thirty-one billion, two hundred twenty million, one hundred one thousand, three hundred twenty-three".