20211012120001 has 4 divisors (see below), whose sum is σ = 20542340187604. Its totient is φ = 19879684052400.

The previous prime is 20211012119989. The next prime is 20211012120029. The reversal of 20211012120001 is 10002121011202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6557691518401 + 13653320601600 = 2560799^2 + 3695040^2 .

It is a cyclic number.

It is not a de Polignac number, because 20211012120001 - 2¹⁷ = 20211011988929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20211012120301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165664033710 + ... + 165664033831.

It is an arithmetic number, because the mean of its divisors is an integer number (5135585046901).

Almost surely, 2^{20211012120001} is an apocalyptic number.

It is an amenable number.

20211012120001 is a deficient number, since it is larger than the sum of its proper divisors (331328067603).

20211012120001 is an equidigital number, since it uses as much as digits as its factorization.

20211012120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331328067602.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20211012120001 its reverse (10002121011202), we get a palindrome (30213133131203).

The spelling of 20211012120001 in words is "twenty trillion, two hundred eleven billion, twelve million, one hundred twenty thousand, one".