20121012102 has 32 divisors (see below), whose sum is σ = 41542351488.
Its totient is φ = 6493044096.
The previous prime is 20121012091. The next prime is 20121012151.
20121012102 is nontrivially palindromic in base 10.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 315928 + ... + 374235.
It is an arithmetic number, because the mean of its divisors is an integer number (1298198484).
Almost surely, 220121012102 is an apocalyptic number.
20121012102 is an abundant number, since it is smaller than the sum of its proper divisors (21421339386).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20121012102 is a wasteful number, since it uses less digits than its factorization.
20121012102 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 690324.
The product of its (nonzero) digits is 16, while the sum is 12.
It can be divided in two parts, 201210 and 12102, that added together give a palindrome (213312).
The spelling of 20121012102 in words is "twenty billion, one hundred twenty-one million, twelve thousand, one hundred two".