221210011002 has 128 divisors (see below), whose sum is σ = 491124695040. Its totient is φ = 66152194560.

The previous prime is 221210010997. The next prime is 221210011007. The reversal of 221210011002 is 200110012122.

It is an interprime number because it is at equal distance from previous prime (221210010997) and next prime (221210011007).

It is a super-2 number, since 2×221210011002² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221210011007) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 86986543 + ... + 86989085.

It is an arithmetic number, because the mean of its divisors is an integer number (3836911680).

Almost surely, 2^221210011002 is an apocalyptic number.

221210011002 is an abundant number, since it is smaller than the sum of its proper divisors (269914684038).

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

221210011002 is a wasteful number, since it uses less digits than its factorization.

221210011002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3148.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221210011002 its reverse (200110012122), we get a palindrome (421320023124).

The spelling of 221210011002 in words is "two hundred twenty-one billion, two hundred ten million, eleven thousand, two".