20011210212001 has 2 divisors, whose sum is σ = 20011210212002. Its totient is φ = 20011210212000.

The previous prime is 20011210211983. The next prime is 20011210212023. The reversal of 20011210212001 is 10021201211002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16514665502976 + 3496544709025 = 4063824^2 + 1869905^2 .

It is a cyclic number.

It is not a de Polignac number, because 20011210212001 - 2⁵ = 20011210211969 is a prime.

It is not a weakly prime, because it can be changed into another prime (20011210212401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005605106000 + 10005605106001.

It is an arithmetic number, because the mean of its divisors is an integer number (10005605106001).

Almost surely, 2^{20011210212001} is an apocalyptic number.

It is an amenable number.

20011210212001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011210212001 is an equidigital number, since it uses as much as digits as its factorization.

20011210212001 is an evil number, because the sum of its binary digits is even.

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

Adding to 20011210212001 its reverse (10021201211002), we get a palindrome (30032411423003).

Subtracting from 20011210212001 its reverse (10021201211002), we obtain a palindrome (9990009000999).

It can be divided in two parts, 20011 and 210212001, that added together give a palindrome (210232012).

The spelling of 20011210212001 in words is "twenty trillion, eleven billion, two hundred ten million, two hundred twelve thousand, one".