211212011211222 has 32 divisors (see below), whose sum is σ = 482783143329792. Its totient is φ = 60344684918784.

The previous prime is 211212011211151. The next prime is 211212011211241. The reversal of 211212011211222 is 222112110212112.

It is a super-2 number, since 2×211212011211222² (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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65233878 + ... + 68395049.

It is an arithmetic number, because the mean of its divisors is an integer number (15086973229056).

Almost surely, 2^{211212011211222} is an apocalyptic number.

211212011211222 is an abundant number, since it is smaller than the sum of its proper divisors (271571132118570).

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

211212011211222 is a wasteful number, since it uses less digits than its factorization.

211212011211222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133666572.

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

Adding to 211212011211222 its reverse (222112110212112), we get a palindrome (433324121423334).

The spelling of 211212011211222 in words is "two hundred eleven trillion, two hundred twelve billion, eleven million, two hundred eleven thousand, two hundred twenty-two".