102221002021012 has 144 divisors (see below), whose sum is σ = 222965098070400. Its totient is φ = 40762521596160.

The previous prime is 102221002020989. The next prime is 102221002021067. The reversal of 102221002021012 is 210120200122201.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 153457689 + ... + 154122367.

It is an arithmetic number, because the mean of its divisors is an integer number (1548368736600).

Almost surely, 2^{102221002021012} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102221002021012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111482549035200).

102221002021012 is an abundant number, since it is smaller than the sum of its proper divisors (120744096049388).

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

102221002021012 is a wasteful number, since it uses less digits than its factorization.

102221002021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665454 (or 665445 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 102221002021012 its reverse (210120200122201), we get a palindrome (312341202143213).

The spelling of 102221002021012 in words is "one hundred two trillion, two hundred twenty-one billion, two million, twenty-one thousand, twelve".