211212221200102 has 4 divisors (see below), whose sum is σ = 316818331800156. Its totient is φ = 105606110600050.

The previous prime is 211212221200091. The next prime is 211212221200103. The reversal of 211212221200102 is 201002122212112.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×211212221200102² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211212221200102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211212221200103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52803055300024 + ... + 52803055300027.

It is an arithmetic number, because the mean of its divisors is an integer number (79204582950039).

Almost surely, 2^{211212221200102} is an apocalyptic number.

211212221200102 is a deficient number, since it is larger than the sum of its proper divisors (105606110600054).

211212221200102 is a wasteful number, since it uses less digits than its factorization.

211212221200102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105606110600053.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 211212221200102 its reverse (201002122212112), we get a palindrome (412214343412214).

The spelling of 211212221200102 in words is "two hundred eleven trillion, two hundred twelve billion, two hundred twenty-one million, two hundred thousand, one hundred two".