21012221012002 has 32 divisors (see below), whose sum is σ = 36414082531584. Its totient is φ = 8987239430400.

The previous prime is 21012221011963. The next prime is 21012221012039. The reversal of 21012221012002 is 20021012221012.

It is a happy 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, 4350778 + ... + 7807285.

It is an arithmetic number, because the mean of its divisors is an integer number (1137940079112).

Almost surely, 2^{21012221012002} is an apocalyptic number.

21012221012002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21012221012002 is a deficient number, since it is larger than the sum of its proper divisors (15401861519582).

21012221012002 is a wasteful number, since it uses less digits than its factorization.

21012221012002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12162714.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21012221012002 its reverse (20021012221012), we get a palindrome (41033233233014).

The spelling of 21012221012002 in words is "twenty-one trillion, twelve billion, two hundred twenty-one million, twelve thousand, two".