20102102002 has 4 divisors (see below), whose sum is σ = 30153153006. Its totient is φ = 10051051000.

The previous prime is 20102101951. The next prime is 20102102039. The reversal of 20102102002 is 20020120102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20020120102 = 2 ⋅10010060051.

It can be written as a sum of positive squares in only one way, i.e., 19886922441 + 215179561 = 141021^2 + 14669^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20102102002.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5025525499 + ... + 5025525502.

Almost surely, 2^20102102002 is an apocalyptic number.

20102102002 is a deficient number, since it is larger than the sum of its proper divisors (10051051004).

20102102002 is a wasteful number, since it uses less digits than its factorization.

20102102002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10051051003.

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

Adding to 20102102002 its reverse (20020120102), we get a palindrome (40122222104).

It can be divided in two parts, 2010 and 2102002, that added together give a palindrome (2104012).

The spelling of 20102102002 in words is "twenty billion, one hundred two million, one hundred two thousand, two".