211211222220012 has 48 divisors (see below), whose sum is σ = 572776195864320. Its totient is φ = 59323248854592.

The previous prime is 211211222219999. The next prime is 211211222220059. The reversal of 211211222220012 is 210022222112112.

It is a super-2 number, since 2×211211222220012² (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 an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21308633283 + ... + 21308643194.

It is an arithmetic number, because the mean of its divisors is an integer number (11932837413840).

Almost surely, 2^{211211222220012} is an apocalyptic number.

It is an amenable number.

211211222220012 is an abundant number, since it is smaller than the sum of its proper divisors (361564973644308).

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

211211222220012 is a wasteful number, since it uses less digits than its factorization.

211211222220012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42617276550 (or 42617276548 counting only the distinct ones).

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

Adding to 211211222220012 its reverse (210022222112112), we get a palindrome (421233444332124).

The spelling of 211211222220012 in words is "two hundred eleven trillion, two hundred eleven billion, two hundred twenty-two million, two hundred twenty thousand, twelve".