21111110221201 has 32 divisors (see below), whose sum is σ = 28518882997248. Its totient is φ = 15091656056640.

The previous prime is 21111110221193. The next prime is 21111110221207. The reversal of 21111110221201 is 10212201111112.

It is a cyclic number.

It is not a de Polignac number, because 21111110221201 - 2³ = 21111110221193 is a prime.

It is a super-3 number, since 3×21111110221201³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21111110221207) 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, 64530151 + ... + 64856476.

It is an arithmetic number, because the mean of its divisors is an integer number (891215093664).

Almost surely, 2^{21111110221201} is an apocalyptic number.

It is an amenable number.

21111110221201 is a deficient number, since it is larger than the sum of its proper divisors (7407772776047).

21111110221201 is a wasteful number, since it uses less digits than its factorization.

21111110221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129386821.

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

Adding to 21111110221201 its reverse (10212201111112), we get a palindrome (31323311332313).

The spelling of 21111110221201 in words is "twenty-one trillion, one hundred eleven billion, one hundred ten million, two hundred twenty-one thousand, two hundred one".