2221221111101 has 8 divisors (see below), whose sum is σ = 2275453668600. Its totient is φ = 2166991240960.

The previous prime is 2221221111089. The next prime is 2221221111107. The reversal of 2221221111101 is 1011111221222.

It can be written as a sum of positive squares in 4 ways, for example, as 23788435225 + 2197432675876 = 154235^2 + 1482374^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2221221111101 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 2221221111101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221221111107) 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, 1054955 + ... + 2356983.

It is an arithmetic number, because the mean of its divisors is an integer number (284431708575).

Almost surely, 2^{2221221111101} is an apocalyptic number.

It is an amenable number.

2221221111101 is a deficient number, since it is larger than the sum of its proper divisors (54232557499).

2221221111101 is a wasteful number, since it uses less digits than its factorization.

2221221111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343679.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 2221221111101 its reverse (1011111221222), we get a palindrome (3232332332323).

The spelling of 2221221111101 in words is "two trillion, two hundred twenty-one billion, two hundred twenty-one million, one hundred eleven thousand, one hundred one".