221001102102012 has 24 divisors (see below), whose sum is σ = 515707371371136. Its totient is φ = 73661586443568.

The previous prime is 221001102101947. The next prime is 221001102102017. The reversal of 221001102102012 is 210201201100122.

It is a junction number, because it is equal to n+sod(n) for n = 221001102101982 and 221001102102000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001102102017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 680779768 + ... + 681104319.

It is an arithmetic number, because the mean of its divisors is an integer number (21487807140464).

Almost surely, 2^{221001102102012} is an apocalyptic number.

It is an amenable number.

221001102102012 is an abundant number, since it is smaller than the sum of its proper divisors (294706269269124).

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

221001102102012 is a wasteful number, since it uses less digits than its factorization.

221001102102012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361897617 (or 1361897615 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221001102102012 its reverse (210201201100122), we get a palindrome (431202303202134).

The spelling of 221001102102012 in words is "two hundred twenty-one trillion, one billion, one hundred two million, one hundred two thousand, twelve".