2201111221221 has 32 divisors (see below), whose sum is σ = 3633039820800. Its totient is φ = 1305623669040.

The previous prime is 2201111221097. The next prime is 2201111221241. The reversal of 2201111221221 is 1221221111022.

2201111221221 is a `hidden beast` number, since 220 + 1 + 1 + 1 + 1 + 221 + 221 = 666.

2201111221221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2201111221221 - 2¹⁴ = 2201111204837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2201111221194 and 2201111221203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201111221241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78828051 + ... + 78855968.

It is an arithmetic number, because the mean of its divisors is an integer number (113532494400).

Almost surely, 2^{2201111221221} is an apocalyptic number.

It is an amenable number.

2201111221221 is a deficient number, since it is larger than the sum of its proper divisors (1431928599579).

2201111221221 is a wasteful number, since it uses less digits than its factorization.

2201111221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157684086 (or 157684080 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2201111221221 its reverse (1221221111022), we get a palindrome (3422332332243).

The spelling of 2201111221221 in words is "two trillion, two hundred one billion, one hundred eleven million, two hundred twenty-one thousand, two hundred twenty-one".