201101221222021 has 16 divisors (see below), whose sum is σ = 211738654254400. Its totient is φ = 190469107584000.

The previous prime is 201101221222009. The next prime is 201101221222067. The reversal of 201101221222021 is 120222122101102.

It is a cyclic number.

It is not a de Polignac number, because 201101221222021 - 2²³ = 201101212833413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 201101221222021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201101221222001) 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, 3865743991 + ... + 3865796011.

It is an arithmetic number, because the mean of its divisors is an integer number (13233665890900).

Almost surely, 2^{201101221222021} is an apocalyptic number.

It is an amenable number.

201101221222021 is a deficient number, since it is larger than the sum of its proper divisors (10637433032379).

201101221222021 is a wasteful number, since it uses less digits than its factorization.

201101221222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99220.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 201101221222021 its reverse (120222122101102), we get a palindrome (321323343323123).

The spelling of 201101221222021 in words is "two hundred one trillion, one hundred one billion, two hundred twenty-one million, two hundred twenty-two thousand, twenty-one".