10010211021 has 6 divisors (see below), whose sum is σ = 14459193710. Its totient is φ = 6673474008.

The previous prime is 10010211019. The next prime is 10010211077. The reversal of 10010211021 is 12011201001.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9015502500 + 994708521 = 94950^2 + 31539^2 .

It is not a de Polignac number, because 10010211021 - 2¹ = 10010211019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 1112245669 = 10010211021 / (1 + 0 + 0 + 1 + 0 + 2 + 1 + 1 + 0 + 2 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10010210994 and 10010211012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10010211221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 556122826 + ... + 556122843.

Almost surely, 2^10010211021 is an apocalyptic number.

It is an amenable number.

10010211021 is a deficient number, since it is larger than the sum of its proper divisors (4448982689).

10010211021 is a wasteful number, since it uses less digits than its factorization.

10010211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112245675 (or 1112245672 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 10010211021 its reverse (12011201001), we get a palindrome (22021412022).

The spelling of 10010211021 in words is "ten billion, ten million, two hundred eleven thousand, twenty-one".