21002103311002 has 16 divisors (see below), whose sum is σ = 34367298868224. Its totient is φ = 9546349284000.

The previous prime is 21002103310999. The next prime is 21002103311027. The reversal of 21002103311002 is 20011330120012.

It is a super-2 number, since 2×21002103311002² (a number of 27 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 531502 + ... + 6502822.

It is an arithmetic number, because the mean of its divisors is an integer number (2147956179264).

Almost surely, 2^{21002103311002} is an apocalyptic number.

21002103311002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21002103311002 is a deficient number, since it is larger than the sum of its proper divisors (13365195557222).

21002103311002 is a wasteful number, since it uses less digits than its factorization.

21002103311002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6131205.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21002103311002 its reverse (20011330120012), we get a palindrome (41013433431014).

The spelling of 21002103311002 in words is "twenty-one trillion, two billion, one hundred three million, three hundred eleven thousand, two".