211211102121222 has 64 divisors (see below), whose sum is σ = 483154773018624. Its totient is φ = 60297725030400.

The previous prime is 211211102121197. The next prime is 211211102121241. The reversal of 211211102121222 is 222121201112112.

It is a super-2 number, since 2×211211102121222² (a number of 29 digits) contains 22 as substring.

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, 385897338 + ... + 386444274.

It is an arithmetic number, because the mean of its divisors is an integer number (7549293328416).

Almost surely, 2^{211211102121222} is an apocalyptic number.

211211102121222 is an abundant number, since it is smaller than the sum of its proper divisors (271943670897402).

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

211211102121222 is a wasteful number, since it uses less digits than its factorization.

211211102121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554293.

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

Adding to 211211102121222 its reverse (222121201112112), we get a palindrome (433332303233334).

The spelling of 211211102121222 in words is "two hundred eleven trillion, two hundred eleven billion, one hundred two million, one hundred twenty-one thousand, two hundred twenty-two".