221011121012102 has 4 divisors (see below), whose sum is σ = 331516681518156. Its totient is φ = 110505560506050.

The previous prime is 221011121012089. The next prime is 221011121012177. The reversal of 221011121012102 is 201210121110122.

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

It is a super-2 number, since 2×221011121012102² (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 (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55252780253024 + ... + 55252780253027.

It is an arithmetic number, because the mean of its divisors is an integer number (82879170379539).

Almost surely, 2^{221011121012102} is an apocalyptic number.

221011121012102 is a deficient number, since it is larger than the sum of its proper divisors (110505560506054).

221011121012102 is a wasteful number, since it uses less digits than its factorization.

221011121012102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110505560506053.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221011121012102 its reverse (201210121110122), we get a palindrome (422221242122224).

The spelling of 221011121012102 in words is "two hundred twenty-one trillion, eleven billion, one hundred twenty-one million, twelve thousand, one hundred two".