221011102121012 has 24 divisors (see below), whose sum is σ = 442022675377920. Its totient is φ = 94718942808480.

The previous prime is 221011102120973. The next prime is 221011102121149. The reversal of 221011102121012 is 210121201110122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26452562 + ... + 33789942.

It is an arithmetic number, because the mean of its divisors is an integer number (18417611474080).

Almost surely, 2^{221011102121012} is an apocalyptic number.

It is an amenable number.

221011102121012 is an abundant number, since it is smaller than the sum of its proper divisors (221011573256908).

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

221011102121012 is a wasteful number, since it uses less digits than its factorization.

221011102121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8413151 (or 8413149 counting only the distinct ones).

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

Adding to 221011102121012 its reverse (210121201110122), we get a palindrome (431132303231134).

The spelling of 221011102121012 in words is "two hundred twenty-one trillion, eleven billion, one hundred two million, one hundred twenty-one thousand, twelve".