221021030002 has 4 divisors (see below), whose sum is σ = 331531545006. Its totient is φ = 110510515000.

The previous prime is 221021029997. The next prime is 221021030011. The reversal of 221021030002 is 200030120122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 213934925961 + 7086104041 = 462531^2 + 84179^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55255257499 + ... + 55255257502.

Almost surely, 2^221021030002 is an apocalyptic number.

221021030002 is a deficient number, since it is larger than the sum of its proper divisors (110510515004).

221021030002 is a wasteful number, since it uses less digits than its factorization.

221021030002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110510515003.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 221021030002 its reverse (200030120122), we get a palindrome (421051150124).

The spelling of 221021030002 in words is "two hundred twenty-one billion, twenty-one million, thirty thousand, two".