211121220021222 has 64 divisors (see below), whose sum is σ = 510950714287104. Its totient is φ = 56771883970560.

The previous prime is 211121220021181. The next prime is 211121220021253. The reversal of 211121220021222 is 222120022121112.

211121220021222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 387932022 + ... + 388475862.

It is an arithmetic number, because the mean of its divisors is an integer number (7983604910736).

Almost surely, 2^{211121220021222} is an apocalyptic number.

211121220021222 is an abundant number, since it is smaller than the sum of its proper divisors (299829494265882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211121220021222 is a wasteful number, since it uses less digits than its factorization.

211121220021222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087573.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 211121220021222 its reverse (222120022121112), we get a palindrome (433241242142334).

The spelling of 211121220021222 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred twenty million, twenty-one thousand, two hundred twenty-two".