10201211021 has 4 divisors (see below), whose sum is σ = 10418258112. Its totient is φ = 9984163932.

The previous prime is 10201211011. The next prime is 10201211089. The reversal of 10201211021 is 12011210201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10201211021 - 2²⁶ = 10134102157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10201210993 and 10201211011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10201211011) 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, 108523475 + ... + 108523568.

It is an arithmetic number, because the mean of its divisors is an integer number (2604564528).

Almost surely, 2^10201211021 is an apocalyptic number.

It is an amenable number.

10201211021 is a deficient number, since it is larger than the sum of its proper divisors (217047091).

10201211021 is an equidigital number, since it uses as much as digits as its factorization.

10201211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217047090.

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

Adding to 10201211021 its reverse (12011210201), we get a palindrome (22212421222).

The spelling of 10201211021 in words is "ten billion, two hundred one million, two hundred eleven thousand, twenty-one".