211110212022121 has 16 divisors (see below), whose sum is σ = 223439533430400. Its totient is φ = 199054279029760.

The previous prime is 211110212022091. The next prime is 211110212022133. The reversal of 211110212022121 is 121220212011112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 211110212022121 - 2¹¹ = 211110212020073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211110212022161) 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, 122290750 + ... + 124005031.

It is an arithmetic number, because the mean of its divisors is an integer number (13964970839400).

Almost surely, 2^{211110212022121} is an apocalyptic number.

It is an amenable number.

211110212022121 is a deficient number, since it is larger than the sum of its proper divisors (12329321408279).

211110212022121 is a wasteful number, since it uses less digits than its factorization.

211110212022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246296336.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211110212022121 its reverse (121220212011112), we get a palindrome (332330424033233).

The spelling of 211110212022121 in words is "two hundred eleven trillion, one hundred ten billion, two hundred twelve million, twenty-two thousand, one hundred twenty-one".