31100203220021 has 8 divisors (see below), whose sum is σ = 33579974400000. Its totient is φ = 28632924590832.

The previous prime is 31100203219997. The next prime is 31100203220057. The reversal of 31100203220021 is 12002230200113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31100203220021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31100203220621) 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, 3123132521 + ... + 3123142478.

It is an arithmetic number, because the mean of its divisors is an integer number (4197496800000).

Almost surely, 2^{31100203220021} is an apocalyptic number.

It is an amenable number.

31100203220021 is a deficient number, since it is larger than the sum of its proper divisors (2479771179979).

31100203220021 is a wasteful number, since it uses less digits than its factorization.

31100203220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6246275395.

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

Adding to 31100203220021 its reverse (12002230200113), we get a palindrome (43102433420134).

The spelling of 31100203220021 in words is "thirty-one trillion, one hundred billion, two hundred three million, two hundred twenty thousand, twenty-one".