10021221211 has 4 divisors (see below), whose sum is σ = 10114877592. Its totient is φ = 9927564832.

The previous prime is 10021221191. The next prime is 10021221239. The reversal of 10021221211 is 11212212001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11212212001 = 677 ⋅16561613.

It is a cyclic number.

It is not a de Polignac number, because 10021221211 - 2¹³ = 10021213019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10021221191 and 10021221200.

It is not an unprimeable number, because it can be changed into a prime (10021221241) 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, 46828030 + ... + 46828243.

It is an arithmetic number, because the mean of its divisors is an integer number (2528719398).

Almost surely, 2^10021221211 is an apocalyptic number.

10021221211 is a deficient number, since it is larger than the sum of its proper divisors (93656381).

10021221211 is an equidigital number, since it uses as much as digits as its factorization.

10021221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93656380.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10021221211 its reverse (11212212001), we get a palindrome (21233433212).

The spelling of 10021221211 in words is "ten billion, twenty-one million, two hundred twenty-one thousand, two hundred eleven".