201102211111221 has 48 divisors (see below), whose sum is σ = 333823576602880. Its totient is φ = 114276826010880.

The previous prime is 201102211111211. The next prime is 201102211111313. The reversal of 201102211111221 is 122111112201102.

It is a happy number.

201102211111221 is a `hidden beast` number, since 2 + 0 + 110 + 221 + 1 + 111 + 221 = 666.

It is not a de Polignac number, because 201102211111221 - 2⁹ = 201102211110709 is a prime.

It is a super-2 number, since 2×201102211111221² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201102211111194 and 201102211111203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201102211111211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 359062920 + ... + 359622558.

Almost surely, 2^{201102211111221} is an apocalyptic number.

201102211111221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

201102211111221 is a deficient number, since it is larger than the sum of its proper divisors (132721365491659).

201102211111221 is a wasteful number, since it uses less digits than its factorization.

201102211111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591346 (or 591343 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 201102211111221 its reverse (122111112201102), we get a palindrome (323213323312323).

The spelling of 201102211111221 in words is "two hundred one trillion, one hundred two billion, two hundred eleven million, one hundred eleven thousand, two hundred twenty-one".