210021101010101 has 8 divisors (see below), whose sum is σ = 210040164611904. Its totient is φ = 210002037936480.

The previous prime is 210021101010047. The next prime is 210021101010131. The reversal of 210021101010101 is 101010101120012.

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 210021101010101 - 2²² = 210021096815797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210021101010131) 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, 1649865266 + ... + 1649992556.

It is an arithmetic number, because the mean of its divisors is an integer number (26255020576488).

Almost surely, 2^{210021101010101} is an apocalyptic number.

It is an amenable number.

210021101010101 is a deficient number, since it is larger than the sum of its proper divisors (19063601803).

210021101010101 is a wasteful number, since it uses less digits than its factorization.

210021101010101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264091.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 210021101010101 its reverse (101010101120012), we get a palindrome (311031202130113).

The spelling of 210021101010101 in words is "two hundred ten trillion, twenty-one billion, one hundred one million, ten thousand, one hundred one".