20010111021211 has 8 divisors (see below), whose sum is σ = 20102407645824. Its totient is φ = 19917837300480.

The previous prime is 20010111021209. The next prime is 20010111021289. The reversal of 20010111021211 is 11212011101002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20010111021211 - 2¹ = 20010111021209 is a prime.

It is a super-3 number, since 3×20010111021211³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20010111021191 and 20010111021200.

It is not an unprimeable number, because it can be changed into a prime (20010111027211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3973396 + ... + 7470481.

It is an arithmetic number, because the mean of its divisors is an integer number (2512800955728).

Almost surely, 2^{20010111021211} is an apocalyptic number.

20010111021211 is a deficient number, since it is larger than the sum of its proper divisors (92296624613).

20010111021211 is a wasteful number, since it uses less digits than its factorization.

20010111021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11451941.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20010111021211 its reverse (11212011101002), we get a palindrome (31222122122213).

The spelling of 20010111021211 in words is "twenty trillion, ten billion, one hundred eleven million, twenty-one thousand, two hundred eleven".