21210122002 has 8 divisors (see below), whose sum is σ = 31861227312. Its totient is φ = 10589712900.

The previous prime is 21210121997. The next prime is 21210122113. The reversal of 21210122002 is 20022101212.

It is a happy number.

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, 7672324 + ... + 7675087.

It is an arithmetic number, because the mean of its divisors is an integer number (3982653414).

Almost surely, 2^21210122002 is an apocalyptic number.

21210122002 is a deficient number, since it is larger than the sum of its proper divisors (10651105310).

21210122002 is a wasteful number, since it uses less digits than its factorization.

21210122002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15348104.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21210122002 its reverse (20022101212), we get a palindrome (41232223214).

The spelling of 21210122002 in words is "twenty-one billion, two hundred ten million, one hundred twenty-two thousand, two".