10211232311221 has 4 divisors (see below), whose sum is σ = 10655198933472. Its totient is φ = 9767265688972.

The previous prime is 10211232311219. The next prime is 10211232311233. The reversal of 10211232311221 is 12211323211201.

It is a happy number.

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 10211232311221 - 2¹ = 10211232311219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10211232311192 and 10211232311201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10211232321221) 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, 221983311091 + ... + 221983311136.

It is an arithmetic number, because the mean of its divisors is an integer number (2663799733368).

Almost surely, 2^{10211232311221} is an apocalyptic number.

It is an amenable number.

10211232311221 is a deficient number, since it is larger than the sum of its proper divisors (443966622251).

10211232311221 is an equidigital number, since it uses as much as digits as its factorization.

10211232311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443966622250.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 10211232311221 its reverse (12211323211201), we get a palindrome (22422555522422).

The spelling of 10211232311221 in words is "ten trillion, two hundred eleven billion, two hundred thirty-two million, three hundred eleven thousand, two hundred twenty-one".