20211200122021 has 8 divisors (see below), whose sum is σ = 20571495429888. Its totient is φ = 19853005662000.

The previous prime is 20211200122019. The next prime is 20211200122027. The reversal of 20211200122021 is 12022100211202.

It is a happy number.

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 20211200122021 - 2¹ = 20211200122019 is a prime.

It is a super-2 number, since 2×20211200122021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20211200121986 and 20211200122004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211200122027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 525192550 + ... + 525231031.

It is an arithmetic number, because the mean of its divisors is an integer number (2571436928736).

Almost surely, 2^{20211200122021} is an apocalyptic number.

It is an amenable number.

20211200122021 is a deficient number, since it is larger than the sum of its proper divisors (360295307867).

20211200122021 is a wasteful number, since it uses less digits than its factorization.

20211200122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050423923.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20211200122021 its reverse (12022100211202), we get a palindrome (32233300333223).

The spelling of 20211200122021 in words is "twenty trillion, two hundred eleven billion, two hundred million, one hundred twenty-two thousand, twenty-one".