20001222002 has 4 divisors (see below), whose sum is σ = 30001833006. Its totient is φ = 10000611000.

The previous prime is 20001221987. The next prime is 20001222013. The reversal of 20001222002 is 20022210002.

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., 18956057761 + 1045164241 = 137681^2 + 32329^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000305499 + ... + 5000305502.

Almost surely, 2^20001222002 is an apocalyptic number.

20001222002 is a deficient number, since it is larger than the sum of its proper divisors (10000611004).

20001222002 is a wasteful number, since it uses less digits than its factorization.

20001222002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10000611003.

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 20001222002 its reverse (20022210002), we get a palindrome (40023432004).

The spelling of 20001222002 in words is "twenty billion, one million, two hundred twenty-two thousand, two".