221211011002 has 8 divisors (see below), whose sum is σ = 331818513012. Its totient is φ = 110604840000.

The previous prime is 221211010981. The next prime is 221211011003. The reversal of 221211011002 is 200110112122.

It can be written as a sum of positive squares in 2 ways, for example, as 220448091361 + 762919641 = 469519^2 + 27621^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×221211011002² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221211011003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 472002 + ... + 815602.

Almost surely, 2^221211011002 is an apocalyptic number.

221211011002 is a deficient number, since it is larger than the sum of its proper divisors (110607502010).

221211011002 is a wasteful number, since it uses less digits than its factorization.

221211011002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665504.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221211011002 its reverse (200110112122), we get a palindrome (421321123124).

The spelling of 221211011002 in words is "two hundred twenty-one billion, two hundred eleven million, eleven thousand, two".