21110011120221 has 8 divisors (see below), whose sum is σ = 29802368640384. Its totient is φ = 13245497173440.

The previous prime is 21110011120139. The next prime is 21110011120273. The reversal of 21110011120221 is 12202111001112.

It is a happy number.

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

It is not a de Polignac number, because 21110011120221 - 2¹⁴ = 21110011103837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21110011120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110011120021) 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, 206960893285 + ... + 206960893386.

It is an arithmetic number, because the mean of its divisors is an integer number (3725296080048).

Almost surely, 2^{21110011120221} is an apocalyptic number.

It is an amenable number.

21110011120221 is a deficient number, since it is larger than the sum of its proper divisors (8692357520163).

21110011120221 is a wasteful number, since it uses less digits than its factorization.

21110011120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413921786691.

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

Adding to 21110011120221 its reverse (12202111001112), we get a palindrome (33312122121333).

The spelling of 21110011120221 in words is "twenty-one trillion, one hundred ten billion, eleven million, one hundred twenty thousand, two hundred twenty-one".