21202211220002 has 4 divisors (see below), whose sum is σ = 31803316830006. Its totient is φ = 10601105610000.

The previous prime is 21202211219971. The next prime is 21202211220023. The reversal of 21202211220002 is 20002211220212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19682541123001 + 1519670097001 = 4436501^2 + 1232749^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5300552804999 + ... + 5300552805002.

Almost surely, 2^{21202211220002} is an apocalyptic number.

21202211220002 is a deficient number, since it is larger than the sum of its proper divisors (10601105610004).

21202211220002 is a wasteful number, since it uses less digits than its factorization.

21202211220002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10601105610003.

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

Adding to 21202211220002 its reverse (20002211220212), we get a palindrome (41204422440214).

The spelling of 21202211220002 in words is "twenty-one trillion, two hundred two billion, two hundred eleven million, two hundred twenty thousand, two".