20010221002 has 4 divisors (see below), whose sum is σ = 30015331506. Its totient is φ = 10005110500.

The previous prime is 20010220987. The next prime is 20010221039. The reversal of 20010221002 is 20012201002.

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., 14459822001 + 5550399001 = 120249^2 + 74501^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20010221002.

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 as a sum of consecutive naturals, namely, 5002555249 + ... + 5002555252.

Almost surely, 2^20010221002 is an apocalyptic number.

20010221002 is a deficient number, since it is larger than the sum of its proper divisors (10005110504).

20010221002 is a wasteful number, since it uses less digits than its factorization.

20010221002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10005110503.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20010221002 its reverse (20012201002), we get a palindrome (40022422004).

The spelling of 20010221002 in words is "twenty billion, ten million, two hundred twenty-one thousand, two".