210101102030021 has 8 divisors (see below), whose sum is σ = 210202821897624. Its totient is φ = 209999388291840.

The previous prime is 210101102029979. The next prime is 210101102030119. The reversal of 210101102030021 is 120030201101012.

It can be written as a sum of positive squares in 4 ways, for example, as 168557276327521 + 41543825702500 = 12982961^2 + 6445450^2 .

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-210101102030021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210101102029978 and 210101102030005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210101102032021) 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, 67797785 + ... + 70828961.

It is an arithmetic number, because the mean of its divisors is an integer number (26275352737203).

Almost surely, 2^{210101102030021} is an apocalyptic number.

It is an amenable number.

210101102030021 is a deficient number, since it is larger than the sum of its proper divisors (101719867603).

210101102030021 is a wasteful number, since it uses less digits than its factorization.

210101102030021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3064711.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 210101102030021 its reverse (120030201101012), we get a palindrome (330131303131033).

The spelling of 210101102030021 in words is "two hundred ten trillion, one hundred one billion, one hundred two million, thirty thousand, twenty-one".