20211002121211 has 16 divisors (see below), whose sum is σ = 22055626567296. Its totient is φ = 18367588800000.

The previous prime is 20211002121143. The next prime is 20211002121251. The reversal of 20211002121211 is 11212120011202.

It is not a de Polignac number, because 20211002121211 - 2¹¹ = 20211002119163 is a prime.

It is a super-2 number, since 2×20211002121211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20211002121251) 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, 568809516 + ... + 568845046.

It is an arithmetic number, because the mean of its divisors is an integer number (1378476660456).

Almost surely, 2^{20211002121211} is an apocalyptic number.

20211002121211 is a deficient number, since it is larger than the sum of its proper divisors (1844624446085).

20211002121211 is a wasteful number, since it uses less digits than its factorization.

20211002121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51114.

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

Adding to 20211002121211 its reverse (11212120011202), we get a palindrome (31423122132413).

The spelling of 20211002121211 in words is "twenty trillion, two hundred eleven billion, two million, one hundred twenty-one thousand, two hundred eleven".