21112020010002 has 16 divisors (see below), whose sum is σ = 42228960766272. Its totient is φ = 7036519878960.

The previous prime is 21112020009973. The next prime is 21112020010007. The reversal of 21112020010002 is 20001002021112.

It is a self number, because there is not a number n which added to its sum of digits gives 21112020010002.

It is not an unprimeable number, because it can be changed into a prime (21112020010007) 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 7 ways as a sum of consecutive naturals, for example, 204975318 + ... + 205078289.

It is an arithmetic number, because the mean of its divisors is an integer number (2639310047892).

Almost surely, 2^{21112020010002} is an apocalyptic number.

21112020010002 is an abundant number, since it is smaller than the sum of its proper divisors (21116940756270).

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

21112020010002 is a wasteful number, since it uses less digits than its factorization.

21112020010002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410062193.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21112020010002 its reverse (20001002021112), we get a palindrome (41113022031114).

The spelling of 21112020010002 in words is "twenty-one trillion, one hundred twelve billion, twenty million, ten thousand, two".