20101000102 has 4 divisors (see below), whose sum is σ = 30151500156. Its totient is φ = 10050500050.

The previous prime is 20101000099. The next prime is 20101000159. The reversal of 20101000102 is 20100010102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20100010102 = 2 ⋅10050005051.

It is a congruent number.

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, 5025250024 + ... + 5025250027.

It is an arithmetic number, because the mean of its divisors is an integer number (7537875039).

Almost surely, 2^20101000102 is an apocalyptic number.

20101000102 is a deficient number, since it is larger than the sum of its proper divisors (10050500054).

20101000102 is a wasteful number, since it uses less digits than its factorization.

20101000102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10050500053.

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 20101000102 its reverse (20100010102), we get a palindrome (40201010204).

The spelling of 20101000102 in words is "twenty billion, one hundred one million, one hundred two", and thus it is an aban number.