211122101120021 has 16 divisors (see below), whose sum is σ = 271140089735424. Its totient is φ = 159778981448064.

The previous prime is 211122101120011. The next prime is 211122101120059. The reversal of 211122101120021 is 120021101221112.

It is a cyclic number.

It is not a de Polignac number, because 211122101120021 - 2⁶ = 211122101119957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211122101120011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50435282456 + ... + 50435286641.

It is an arithmetic number, because the mean of its divisors is an integer number (16946255608464).

Almost surely, 2^{211122101120021} is an apocalyptic number.

It is an amenable number.

211122101120021 is a deficient number, since it is larger than the sum of its proper divisors (60017988615403).

211122101120021 is a wasteful number, since it uses less digits than its factorization.

211122101120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100870569140.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 211122101120021 its reverse (120021101221112), we get a palindrome (331143202341133).

The spelling of 211122101120021 in words is "two hundred eleven trillion, one hundred twenty-two billion, one hundred one million, one hundred twenty thousand, twenty-one".