221000211002 has 4 divisors (see below), whose sum is σ = 331500316506. Its totient is φ = 110500105500.

The previous prime is 221000210957. The next prime is 221000211011. The reversal of 221000211002 is 200112000122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 200112000122 = 2 ⋅100056000061.

It can be written as a sum of positive squares in only one way, i.e., 184557019201 + 36443191801 = 429601^2 + 190901^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55250052749 + ... + 55250052752.

Almost surely, 2^221000211002 is an apocalyptic number.

221000211002 is a deficient number, since it is larger than the sum of its proper divisors (110500105504).

221000211002 is a wasteful number, since it uses less digits than its factorization.

221000211002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110500105503.

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

Adding to 221000211002 its reverse (200112000122), we get a palindrome (421112211124).

The spelling of 221000211002 in words is "two hundred twenty-one billion, two hundred eleven thousand, two".