21202122002 has 16 divisors (see below), whose sum is σ = 33501048000. Its totient is φ = 10035906480.

The previous prime is 21202121987. The next prime is 21202122023. The reversal of 21202122002 is 20022120212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146249 + ... + 252572.

It is an arithmetic number, because the mean of its divisors is an integer number (2093815500).

Almost surely, 2^21202122002 is an apocalyptic number.

21202122002 is a deficient number, since it is larger than the sum of its proper divisors (12298925998).

21202122002 is a wasteful number, since it uses less digits than its factorization.

21202122002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400241.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21202122002 its reverse (20022120212), we get a palindrome (41224242214).

It can be divided in two parts, 2120212 and 2002, that multiplied together give a palindrome (4244664424).

The spelling of 21202122002 in words is "twenty-one billion, two hundred two million, one hundred twenty-two thousand, two".