210102111101021 has 8 divisors (see below), whose sum is σ = 210218628340224. Its totient is φ = 209985595254160.

The previous prime is 210102111101009. The next prime is 210102111101039. The reversal of 210102111101021 is 120101111201012.

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 210102111101021 - 2¹⁰ = 210102111099997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210102111100987 and 210102111101005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210102111101521) 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, 500234576 + ... + 500654406.

It is an arithmetic number, because the mean of its divisors is an integer number (26277328542528).

Almost surely, 2^{210102111101021} is an apocalyptic number.

It is an amenable number.

210102111101021 is a deficient number, since it is larger than the sum of its proper divisors (116517239203).

210102111101021 is a wasteful number, since it uses less digits than its factorization.

210102111101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696171.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 210102111101021 its reverse (120101111201012), we get a palindrome (330203222302033).

Subtracting from 210102111101021 its reverse (120101111201012), we obtain a palindrome (90000999900009).

The spelling of 210102111101021 in words is "two hundred ten trillion, one hundred two billion, one hundred eleven million, one hundred one thousand, twenty-one".