20110221002 has 16 divisors (see below), whose sum is σ = 30482901960. Its totient is φ = 9949298688.

The previous prime is 20110220993. The next prime is 20110221023. The reversal of 20110221002 is 20012201102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18607960921 + 1502260081 = 136411^2 + 38759^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1258688 + ... + 1274564.

Almost surely, 2^20110221002 is an apocalyptic number.

20110221002 is a deficient number, since it is larger than the sum of its proper divisors (10372680958).

20110221002 is a wasteful number, since it uses less digits than its factorization.

20110221002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22505.

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

Adding to 20110221002 its reverse (20012201102), we get a palindrome (40122422104).

The spelling of 20110221002 in words is "twenty billion, one hundred ten million, two hundred twenty-one thousand, two".