20121000102 has 32 divisors (see below), whose sum is σ = 51100953600. Its totient is φ = 5748857064.

The previous prime is 20121000101. The next prime is 20121000103. The reversal of 20121000102 is 20100012102.

It is an interprime number because it is at equal distance from previous prime (20121000101) and next prime (20121000103).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121000101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26614702 + ... + 26615457.

It is an arithmetic number, because the mean of its divisors is an integer number (1596904800).

Almost surely, 2^20121000102 is an apocalyptic number.

20121000102 is an abundant number, since it is smaller than the sum of its proper divisors (30979953498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20121000102 is a wasteful number, since it uses less digits than its factorization.

20121000102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53230177 (or 53230171 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20121000102 its reverse (20100012102), we get a palindrome (40221012204).

The spelling of 20121000102 in words is "twenty billion, one hundred twenty-one million, one hundred two", and thus it is an aban number.