211211220021222 has 8 divisors (see below), whose sum is σ = 422422440042456. Its totient is φ = 70403740007072.

The previous prime is 211211220021211. The next prime is 211211220021227. The reversal of 211211220021222 is 222120022112112.

It is a sphenic number, since it is the product of 3 distinct primes.

211211220021222 is an admirable number.

It is a super-2 number, since 2×211211220021222² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211211220021227) 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, 17600935001763 + ... + 17600935001774.

It is an arithmetic number, because the mean of its divisors is an integer number (52802805005307).

Almost surely, 2^{211211220021222} is an apocalyptic number.

211211220021222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

211211220021222 is a wasteful number, since it uses less digits than its factorization.

211211220021222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35201870003542.

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

Adding to 211211220021222 its reverse (222120022112112), we get a palindrome (433331242133334).

The spelling of 211211220021222 in words is "two hundred eleven trillion, two hundred eleven billion, two hundred twenty million, twenty-one thousand, two hundred twenty-two".