20211020001211 has 16 divisors (see below), whose sum is σ = 23047662141504. Its totient is φ = 17557666873344.

The previous prime is 20211020001203. The next prime is 20211020001259. The reversal of 20211020001211 is 11210002011202.

It is not a de Polignac number, because 20211020001211 - 2³ = 20211020001203 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 20211020001191 and 20211020001200.

It is not an unprimeable number, because it can be changed into a prime (20211020011211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25350 + ... + 6357883.

It is an arithmetic number, because the mean of its divisors is an integer number (1440478883844).

Almost surely, 2^{20211020001211} is an apocalyptic number.

20211020001211 is a deficient number, since it is larger than the sum of its proper divisors (2836642140293).

20211020001211 is a wasteful number, since it uses less digits than its factorization.

20211020001211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6397590.

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

Adding to 20211020001211 its reverse (11210002011202), we get a palindrome (31421022012413).

The spelling of 20211020001211 in words is "twenty trillion, two hundred eleven billion, twenty million, one thousand, two hundred eleven".