31020222100021 has 32 divisors (see below), whose sum is σ = 39301229445120. Its totient is φ = 23981273149680.

The previous prime is 31020222099959. The next prime is 31020222100027. The reversal of 31020222100021 is 12000122202013.

It is a happy number.

It is not a de Polignac number, because 31020222100021 - 2¹⁵ = 31020222067253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31020222099968 and 31020222100004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020222100027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11924701 + ... + 14291218.

It is an arithmetic number, because the mean of its divisors is an integer number (1228163420160).

Almost surely, 2^{31020222100021} is an apocalyptic number.

It is an amenable number.

31020222100021 is a deficient number, since it is larger than the sum of its proper divisors (8281007345099).

31020222100021 is a wasteful number, since it uses less digits than its factorization.

31020222100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26216086 (or 26216064 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 31020222100021 its reverse (12000122202013), we get a palindrome (43020344302034).

The spelling of 31020222100021 in words is "thirty-one trillion, twenty billion, two hundred twenty-two million, one hundred thousand, twenty-one".