20101022002 has 4 divisors (see below), whose sum is σ = 30151533006. Its totient is φ = 10050511000.

The previous prime is 20101021999. The next prime is 20101022009. The reversal of 20101022002 is 20022010102.

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., 14344613361 + 5756408641 = 119769^2 + 75871^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20101022002.

It is not an unprimeable number, because it can be changed into a prime (20101022009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5025255499 + ... + 5025255502.

Almost surely, 2^20101022002 is an apocalyptic number.

20101022002 is a deficient number, since it is larger than the sum of its proper divisors (10050511004).

20101022002 is a wasteful number, since it uses less digits than its factorization.

20101022002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10050511003.

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

Adding to 20101022002 its reverse (20022010102), we get a palindrome (40123032104).

It can be divided in two parts, 2010102 and 2002, that multiplied together give a palindrome (4024224204).

The spelling of 20101022002 in words is "twenty billion, one hundred one million, twenty-two thousand, two".