20121031202021 has 8 divisors (see below), whose sum is σ = 20160050083200. Its totient is φ = 20082013850080.

The previous prime is 20121031201993. The next prime is 20121031202029. The reversal of 20121031202021 is 12020213012102.

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 20121031202021 - 2³⁴ = 20103851332837 is a prime.

It is a super-2 number, since 2×20121031202021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121031202029) 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 7 ways as a sum of consecutive naturals, for example, 27997460 + ... + 28707138.

It is an arithmetic number, because the mean of its divisors is an integer number (2520006260400).

Almost surely, 2^{20121031202021} is an apocalyptic number.

It is an amenable number.

20121031202021 is a deficient number, since it is larger than the sum of its proper divisors (39018881179).

20121031202021 is an equidigital number, since it uses as much as digits as its factorization.

20121031202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764619.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20121031202021 its reverse (12020213012102), we get a palindrome (32141244214123).

The spelling of 20121031202021 in words is "twenty trillion, one hundred twenty-one billion, thirty-one million, two hundred two thousand, twenty-one".