21220210210001 has 16 divisors (see below), whose sum is σ = 23669443149120. Its totient is φ = 18860236749120.

The previous prime is 21220210209943. The next prime is 21220210210009. The reversal of 21220210210001 is 10001201202212.

It is a cyclic number.

It is not a de Polignac number, because 21220210210001 - 2⁶ = 21220210209937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21220210210009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64142966 + ... + 64472943.

It is an arithmetic number, because the mean of its divisors is an integer number (1479340196820).

Almost surely, 2^{21220210210001} is an apocalyptic number.

It is an amenable number.

21220210210001 is a deficient number, since it is larger than the sum of its proper divisors (2449232939119).

21220210210001 is a wasteful number, since it uses less digits than its factorization.

21220210210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128616256.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21220210210001 its reverse (10001201202212), we get a palindrome (31221411412213).

The spelling of 21220210210001 in words is "twenty-one trillion, two hundred twenty billion, two hundred ten million, two hundred ten thousand, one".