211120221121221 has 32 divisors (see below), whose sum is σ = 284880108699648. Its totient is φ = 139060606611200.

The previous prime is 211120221121211. The next prime is 211120221121261. The reversal of 211120221121221 is 122121122021112.

It is a cyclic number.

It is not a de Polignac number, because 211120221121221 - 2⁷ = 211120221121093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211120221121211) 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, 4487027146 + ... + 4487074196.

It is an arithmetic number, because the mean of its divisors is an integer number (8902503396864).

Almost surely, 2^{211120221121221} is an apocalyptic number.

It is an amenable number.

211120221121221 is a deficient number, since it is larger than the sum of its proper divisors (73759887578427).

211120221121221 is a wasteful number, since it uses less digits than its factorization.

211120221121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84041.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 211120221121221 its reverse (122121122021112), we get a palindrome (333241343142333).

The spelling of 211120221121221 in words is "two hundred eleven trillion, one hundred twenty billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred twenty-one".