20211212021201 has 8 divisors (see below), whose sum is σ = 20704382349000. Its totient is φ = 19718051880960.

The previous prime is 20211212021113. The next prime is 20211212021213. The reversal of 20211212021201 is 10212021211202.

It can be written as a sum of positive squares in 4 ways, for example, as 4537649790976 + 15673562230225 = 2130176^2 + 3958985^2 .

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-20211212021201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20211212021201.

It is not an unprimeable number, because it can be changed into a prime (20211212021251) 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, 1548725 + ... + 6543773.

It is an arithmetic number, because the mean of its divisors is an integer number (2588047793625).

Almost surely, 2^{20211212021201} is an apocalyptic number.

It is an amenable number.

20211212021201 is a deficient number, since it is larger than the sum of its proper divisors (493170327799).

20211212021201 is an equidigital number, since it uses as much as digits as its factorization.

20211212021201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5093779.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20211212021201 its reverse (10212021211202), we get a palindrome (30423233232403).

The spelling of 20211212021201 in words is "twenty trillion, two hundred eleven billion, two hundred twelve million, twenty-one thousand, two hundred one".