20011001120221 has 4 divisors (see below), whose sum is σ = 20025024247872. Its totient is φ = 19996977992572.

The previous prime is 20011001120219. The next prime is 20011001120233. The reversal of 20011001120221 is 12202110011002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20011001120221 - 2¹ = 20011001120219 is a prime.

It is a super-2 number, since 2×20011001120221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011001120251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7011561685 + ... + 7011564538.

It is an arithmetic number, because the mean of its divisors is an integer number (5006256061968).

Almost surely, 2^{20011001120221} is an apocalyptic number.

It is an amenable number.

20011001120221 is a deficient number, since it is larger than the sum of its proper divisors (14023127651).

20011001120221 is a wasteful number, since it uses less digits than its factorization.

20011001120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14023127650.

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

Adding to 20011001120221 its reverse (12202110011002), we get a palindrome (32213111131223).

The spelling of 20011001120221 in words is "twenty trillion, eleven billion, one million, one hundred twenty thousand, two hundred twenty-one".