10021021211 has 4 divisors (see below), whose sum is σ = 10548443400. Its totient is φ = 9493599024.

The previous prime is 10021021187. The next prime is 10021021217. The reversal of 10021021211 is 11212012001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10021021211 - 2²⁶ = 9953912347 is a prime.

It is a super-2 number, since 2×10021021211² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10021021192 and 10021021201.

It is not an unprimeable number, because it can be changed into a prime (10021021217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263711066 + ... + 263711103.

It is an arithmetic number, because the mean of its divisors is an integer number (2637110850).

Almost surely, 2^10021021211 is an apocalyptic number.

10021021211 is a deficient number, since it is larger than the sum of its proper divisors (527422189).

10021021211 is an equidigital number, since it uses as much as digits as its factorization.

10021021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527422188.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10021021211 its reverse (11212012001), we get a palindrome (21233033212).

The spelling of 10021021211 in words is "ten billion, twenty-one million, twenty-one thousand, two hundred eleven".