211121121220102 has 4 divisors (see below), whose sum is σ = 316681681830156. Its totient is φ = 105560560610050.

The previous prime is 211121121220099. The next prime is 211121121220169. The reversal of 211121121220102 is 201022121121112.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 211121121220102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52780280305024 + ... + 52780280305027.

It is an arithmetic number, because the mean of its divisors is an integer number (79170420457539).

Almost surely, 2^{211121121220102} is an apocalyptic number.

211121121220102 is a deficient number, since it is larger than the sum of its proper divisors (105560560610054).

211121121220102 is a wasteful number, since it uses less digits than its factorization.

211121121220102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105560560610053.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211121121220102 its reverse (201022121121112), we get a palindrome (412143242341214).

The spelling of 211121121220102 in words is "two hundred eleven trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred twenty thousand, one hundred two".