20201210001111 has 4 divisors (see below), whose sum is σ = 26934946668152. Its totient is φ = 13467473334072.

The previous prime is 20201210001059. The next prime is 20201210001221. The reversal of 20201210001111 is 11110001210202.

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

It is not a de Polignac number, because 20201210001111 - 2¹¹ = 20201209999063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201210002111) 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, 3366868333516 + ... + 3366868333521.

It is an arithmetic number, because the mean of its divisors is an integer number (6733736667038).

Almost surely, 2^{20201210001111} is an apocalyptic number.

20201210001111 is a deficient number, since it is larger than the sum of its proper divisors (6733736667041).

20201210001111 is an equidigital number, since it uses as much as digits as its factorization.

20201210001111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6733736667040.

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

Adding to 20201210001111 its reverse (11110001210202), we get a palindrome (31311211211313).

The spelling of 20201210001111 in words is "twenty trillion, two hundred one billion, two hundred ten million, one thousand, one hundred eleven".