20211201021211 has 16 divisors (see below), whose sum is σ = 21286831737600. Its totient is φ = 19136760638688.

The previous prime is 20211201021169. The next prime is 20211201021259. The reversal of 20211201021211 is 11212010211202.

It is not a de Polignac number, because 20211201021211 - 2²⁵ = 20211167466779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20211201021281) 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, 478951365 + ... + 478993561.

It is an arithmetic number, because the mean of its divisors is an integer number (1330426983600).

Almost surely, 2^{20211201021211} is an apocalyptic number.

20211201021211 is a deficient number, since it is larger than the sum of its proper divisors (1075630716389).

20211201021211 is a wasteful number, since it uses less digits than its factorization.

20211201021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55698.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20211201021211 its reverse (11212010211202), we get a palindrome (31423211232413).

The spelling of 20211201021211 in words is "twenty trillion, two hundred eleven billion, two hundred one million, twenty-one thousand, two hundred eleven".