20101012211021 has 8 divisors (see below), whose sum is σ = 23010936950400. Its totient is φ = 17200675363248.

The previous prime is 20101012211011. The next prime is 20101012211047. The reversal of 20101012211021 is 12011221010102.

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-20101012211021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20101012210987 and 20101012211005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101012211011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2396968406 + ... + 2396976791.

It is an arithmetic number, because the mean of its divisors is an integer number (2876367118800).

Almost surely, 2^{20101012211021} is an apocalyptic number.

It is an amenable number.

20101012211021 is a deficient number, since it is larger than the sum of its proper divisors (2909924739379).

20101012211021 is an equidigital number, since it uses as much as digits as its factorization.

20101012211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4793945803.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20101012211021 its reverse (12011221010102), we get a palindrome (32112233221123).

The spelling of 20101012211021 in words is "twenty trillion, one hundred one billion, twelve million, two hundred eleven thousand, twenty-one".