10211010221021 has 8 divisors (see below), whose sum is σ = 10513156006584. Its totient is φ = 9911392852480.

The previous prime is 10211010220997. The next prime is 10211010221047. The reversal of 10211010221021 is 12012201011201.

It can be written as a sum of positive squares in 4 ways, for example, as 1130798292100 + 9080211928921 = 1063390^2 + 3013339^2 .

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 10211010221021 - 2²² = 10211006026717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10211010220987 and 10211010221005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10211010221051) 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, 632096060 + ... + 632112213.

It is an arithmetic number, because the mean of its divisors is an integer number (1314144500823).

Almost surely, 2^{10211010221021} is an apocalyptic number.

It is an amenable number.

10211010221021 is a deficient number, since it is larger than the sum of its proper divisors (302145785563).

10211010221021 is a wasteful number, since it uses less digits than its factorization.

10211010221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264208511.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 10211010221021 its reverse (12012201011201), we get a palindrome (22223211232222).

The spelling of 10211010221021 in words is "ten trillion, two hundred eleven billion, ten million, two hundred twenty-one thousand, twenty-one".