21202202001211 has 8 divisors (see below), whose sum is σ = 26433914183424. Its totient is φ = 16521196364520.

The previous prime is 21202202001199. The next prime is 21202202001223. The reversal of 21202202001211 is 11210020220212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21202202001199) and next prime (21202202001223).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21202202001211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21202202001611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137676636295 + ... + 137676636448.

It is an arithmetic number, because the mean of its divisors is an integer number (3304239272928).

Almost surely, 2^{21202202001211} is an apocalyptic number.

21202202001211 is a deficient number, since it is larger than the sum of its proper divisors (5231712182213).

21202202001211 is a wasteful number, since it uses less digits than its factorization.

21202202001211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275353272761.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21202202001211 its reverse (11210020220212), we get a palindrome (32412222221423).

The spelling of 21202202001211 in words is "twenty-one trillion, two hundred two billion, two hundred two million, one thousand, two hundred eleven".