21012021012002 has 32 divisors (see below), whose sum is σ = 32188422684672. Its totient is φ = 10284722198784.

The previous prime is 21012021011987. The next prime is 21012021012007. The reversal of 21012021012002 is 20021012021012.

It is not an unprimeable number, because it can be changed into a prime (21012021012007) 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 in 15 ways as a sum of consecutive naturals, for example, 122786783 + ... + 122957789.

It is an arithmetic number, because the mean of its divisors is an integer number (1005888208896).

Almost surely, 2^{21012021012002} is an apocalyptic number.

21012021012002 is a deficient number, since it is larger than the sum of its proper divisors (11176401672670).

21012021012002 is a wasteful number, since it uses less digits than its factorization.

21012021012002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177362.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21012021012002 its reverse (20021012021012), we get a palindrome (41033033033014).

The spelling of 21012021012002 in words is "twenty-one trillion, twelve billion, twenty-one million, twelve thousand, two".