2221101111021 has 8 divisors (see below), whose sum is σ = 3189273390240. Its totient is φ = 1366831452912.

The previous prime is 2221101111011. The next prime is 2221101111113. The reversal of 2221101111021 is 1201111011222.

It is a happy number.

2221101111021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2221101111021 - 2²⁶ = 2221034002157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221101111001) 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, 28475655231 + ... + 28475655308.

It is an arithmetic number, because the mean of its divisors is an integer number (398659173780).

Almost surely, 2^{2221101111021} is an apocalyptic number.

It is an amenable number.

2221101111021 is a deficient number, since it is larger than the sum of its proper divisors (968172279219).

2221101111021 is a wasteful number, since it uses less digits than its factorization.

2221101111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56951310555.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2221101111021 its reverse (1201111011222), we get a palindrome (3422212122243).

The spelling of 2221101111021 in words is "two trillion, two hundred twenty-one billion, one hundred one million, one hundred eleven thousand, twenty-one".