31101101323021 has 8 divisors (see below), whose sum is σ = 33381681679224. Its totient is φ = 28870643612160.

The previous prime is 31101101323013. The next prime is 31101101323051. The reversal of 31101101323021 is 12032310110113.

It can be written as a sum of positive squares in 4 ways, for example, as 15403379981796 + 15697721341225 = 3924714^2 + 3962035^2 .

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 31101101323021 - 2³ = 31101101323013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31101101323021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31101101323051) 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, 12530660050 + ... + 12530662531.

It is an arithmetic number, because the mean of its divisors is an integer number (4172710209903).

Almost surely, 2^{31101101323021} is an apocalyptic number.

It is an amenable number.

31101101323021 is a deficient number, since it is larger than the sum of its proper divisors (2280580356203).

31101101323021 is a wasteful number, since it uses less digits than its factorization.

31101101323021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25061322671.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 31101101323021 its reverse (12032310110113), we get a palindrome (43133411433134).

The spelling of 31101101323021 in words is "thirty-one trillion, one hundred one billion, one hundred one million, three hundred twenty-three thousand, twenty-one".