210021210010001 has 8 divisors (see below), whose sum is σ = 226359530636904. Its totient is φ = 193709009802240.

The previous prime is 210021210009931. The next prime is 210021210010033. The reversal of 210021210010001 is 100010012120012.

It can be written as a sum of positive squares in 4 ways, for example, as 60477685027600 + 149543524982401 = 7776740^2 + 12228799^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 210021210010001 - 2¹⁰ = 210021210008977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210021210010081) 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, 6530088080 + ... + 6530120241.

It is an arithmetic number, because the mean of its divisors is an integer number (28294941329613).

Almost surely, 2^{210021210010001} is an apocalyptic number.

It is an amenable number.

210021210010001 is a deficient number, since it is larger than the sum of its proper divisors (16338320626903).

210021210010001 is a wasteful number, since it uses less digits than its factorization.

210021210010001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13060209571.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 210021210010001 its reverse (100010012120012), we get a palindrome (310031222130013).

The spelling of 210021210010001 in words is "two hundred ten trillion, twenty-one billion, two hundred ten million, ten thousand, one".