221002010012 has 96 divisors (see below), whose sum is σ = 490160885760. Its totient is φ = 84952074240.

The previous prime is 221002010011. The next prime is 221002010039. The reversal of 221002010012 is 210010200122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221002009975 and 221002010002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002010011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2929664 + ... + 3004152.

It is an arithmetic number, because the mean of its divisors is an integer number (5105842560).

Almost surely, 2^221002010012 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 221002010012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245080442880).

221002010012 is an abundant number, since it is smaller than the sum of its proper divisors (269158875748).

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

221002010012 is a wasteful number, since it uses less digits than its factorization.

221002010012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74811 (or 74809 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 221002010012 its reverse (210010200122), we get a palindrome (431012210134).

The spelling of 221002010012 in words is "two hundred twenty-one billion, two million, ten thousand, twelve".