21220010002 has 8 divisors (see below), whose sum is σ = 31850332416. Its totient is φ = 10603232532.

The previous prime is 21220009973. The next prime is 21220010023. The reversal of 21220010002 is 20001002212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3382318 + ... + 3388585.

It is an arithmetic number, because the mean of its divisors is an integer number (3981291552).

Almost surely, 2^21220010002 is an apocalyptic number.

21220010002 is a deficient number, since it is larger than the sum of its proper divisors (10630322414).

21220010002 is a wasteful number, since it uses less digits than its factorization.

21220010002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6772472.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 21220010002 its reverse (20001002212), we get a palindrome (41221012214).

The spelling of 21220010002 in words is "twenty-one billion, two hundred twenty million, ten thousand, two".