211221212112102 has 32 divisors (see below), whose sum is σ = 425315773260000. Its totient is φ = 69928264009728.

The previous prime is 211221212112091. The next prime is 211221212112143. The reversal of 211221212112102 is 201211212122112.

It is a super-2 number, since 2×211221212112102² (a number of 29 digits) contains 22 as substring.

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, 628603 + ... + 20563014.

It is an arithmetic number, because the mean of its divisors is an integer number (13291117914375).

Almost surely, 2^{211221212112102} is an apocalyptic number.

211221212112102 is an abundant number, since it is smaller than the sum of its proper divisors (214094561147898).

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

211221212112102 is a wasteful number, since it uses less digits than its factorization.

211221212112102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21202920.

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

Adding to 211221212112102 its reverse (201211212122112), we get a palindrome (412432424234214).

The spelling of 211221212112102 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred twelve million, one hundred twelve thousand, one hundred two".