20010221033111 has 8 divisors (see below), whose sum is σ = 20184893030400. Its totient is φ = 19836202016088.

The previous prime is 20010221033107. The next prime is 20010221033183. The reversal of 20010221033111 is 11133012201002.

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 20010221033111 - 2² = 20010221033107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20010221033111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010221032111) 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, 163183511 + ... + 163306088.

It is an arithmetic number, because the mean of its divisors is an integer number (2523111628800).

Almost surely, 2^{20010221033111} is an apocalyptic number.

20010221033111 is a deficient number, since it is larger than the sum of its proper divisors (174671997289).

20010221033111 is a wasteful number, since it uses less digits than its factorization.

20010221033111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326490133.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 20010221033111 its reverse (11133012201002), we get a palindrome (31143233234113).

The spelling of 20010221033111 in words is "twenty trillion, ten billion, two hundred twenty-one million, thirty-three thousand, one hundred eleven".