21012030102102 has 32 divisors (see below), whose sum is σ = 45259980396288. Its totient is φ = 6464768577696.

The previous prime is 21012030102073. The next prime is 21012030102127. The reversal of 21012030102102 is 20120103021012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8744698 + ... + 10885485.

It is an arithmetic number, because the mean of its divisors is an integer number (1414374387384).

Almost surely, 2^{21012030102102} is an apocalyptic number.

21012030102102 is an abundant number, since it is smaller than the sum of its proper divisors (24247950294186).

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

21012030102102 is a wasteful number, since it uses less digits than its factorization.

21012030102102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19643924.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21012030102102 its reverse (20120103021012), we get a palindrome (41132133123114).

The spelling of 21012030102102 in words is "twenty-one trillion, twelve billion, thirty million, one hundred two thousand, one hundred two".