21220210122002 has 8 divisors (see below), whose sum is σ = 32352123628812. Its totient is φ = 10436168912400.

The previous prime is 21220210121989. The next prime is 21220210122071. The reversal of 21220210122002 is 20022101202212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19073929451641 + 2146280670361 = 4367371^2 + 1465019^2 .

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

It is a super-2 number, since 2×21220210122002² (a number of 27 digits) contains 22 as substring.

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, 86968074149 + ... + 86968074392.

Almost surely, 2^{21220210122002} is an apocalyptic number.

21220210122002 is a deficient number, since it is larger than the sum of its proper divisors (11131913506810).

21220210122002 is a wasteful number, since it uses less digits than its factorization.

21220210122002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173936148604.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21220210122002 its reverse (20022101202212), we get a palindrome (41242311324214).

The spelling of 21220210122002 in words is "twenty-one trillion, two hundred twenty billion, two hundred ten million, one hundred twenty-two thousand, two".