20011012221011 has 16 divisors (see below), whose sum is σ = 23056949127168. Its totient is φ = 17012024203200.

The previous prime is 20011012220887. The next prime is 20011012221049. The reversal of 20011012221011 is 11012221011002.

It is a cyclic number.

It is not a de Polignac number, because 20011012221011 - 2¹⁴ = 20011012204627 is a prime.

It is a super-2 number, since 2×20011012221011² (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 (20011012221061) 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, 4313570 + ... + 7656951.

It is an arithmetic number, because the mean of its divisors is an integer number (1441059320448).

Almost surely, 2^{20011012221011} is an apocalyptic number.

20011012221011 is a deficient number, since it is larger than the sum of its proper divisors (3045936906157).

20011012221011 is a wasteful number, since it uses less digits than its factorization.

20011012221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11972482.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20011012221011 its reverse (11012221011002), we get a palindrome (31023233232013).

The spelling of 20011012221011 in words is "twenty trillion, eleven billion, twelve million, two hundred twenty-one thousand, eleven".