20100122102 has 4 divisors (see below), whose sum is σ = 30150183156. Its totient is φ = 10050061050.

The previous prime is 20100122101. The next prime is 20100122149. The reversal of 20100122102 is 20122100102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100122101) by changing a digit.

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, 5025030524 + ... + 5025030527.

It is an arithmetic number, because the mean of its divisors is an integer number (7537545789).

Almost surely, 2^20100122102 is an apocalyptic number.

20100122102 is a deficient number, since it is larger than the sum of its proper divisors (10050061054).

20100122102 is a wasteful number, since it uses less digits than its factorization.

20100122102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10050061053.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20100122102 its reverse (20122100102), we get a palindrome (40222222204).

The spelling of 20100122102 in words is "twenty billion, one hundred million, one hundred twenty-two thousand, one hundred two".