211122222011121 has 4 divisors (see below), whose sum is σ = 281496296014832. Its totient is φ = 140748148007412.

The previous prime is 211122222011101. The next prime is 211122222011123. The reversal of 211122222011121 is 121110222221112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 211122222011121 - 2³⁴ = 211105042141937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211122222011123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35187037001851 + ... + 35187037001856.

It is an arithmetic number, because the mean of its divisors is an integer number (70374074003708).

Almost surely, 2^{211122222011121} is an apocalyptic number.

It is an amenable number.

211122222011121 is a deficient number, since it is larger than the sum of its proper divisors (70374074003711).

211122222011121 is an equidigital number, since it uses as much as digits as its factorization.

211122222011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70374074003710.

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

Adding to 211122222011121 its reverse (121110222221112), we get a palindrome (332232444232233).

The spelling of 211122222011121 in words is "two hundred eleven trillion, one hundred twenty-two billion, two hundred twenty-two million, eleven thousand, one hundred twenty-one".