20211010101021 has 16 divisors (see below), whose sum is σ = 27301803183360. Its totient is φ = 13297270321920.

The previous prime is 20211010101011. The next prime is 20211010101047. The reversal of 20211010101021 is 12010101011202.

It is not a de Polignac number, because 20211010101021 - 2³³ = 20202420166429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20211010100988 and 20211010101006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211010101011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19294320 + ... + 20314841.

It is an arithmetic number, because the mean of its divisors is an integer number (1706362698960).

Almost surely, 2^{20211010101021} is an apocalyptic number.

It is an amenable number.

20211010101021 is a deficient number, since it is larger than the sum of its proper divisors (7090793082339).

20211010101021 is a wasteful number, since it uses less digits than its factorization.

20211010101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39611396.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20211010101021 its reverse (12010101011202), we get a palindrome (32221111112223).

The spelling of 20211010101021 in words is "twenty trillion, two hundred eleven billion, ten million, one hundred one thousand, twenty-one".