10211231111221 has 16 divisors (see below), whose sum is σ = 11777337088000. Its totient is φ = 8671968822528.

The previous prime is 10211231111167. The next prime is 10211231111233. The reversal of 10211231111221 is 12211113211201.

10211231111221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 10211231111221 - 2¹⁹ = 10211230586933 is a prime.

It is a super-2 number, since 2×10211231111221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10211231111021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35258221 + ... + 35546653.

It is an arithmetic number, because the mean of its divisors is an integer number (736083568000).

Almost surely, 2^{10211231111221} is an apocalyptic number.

It is an amenable number.

10211231111221 is a deficient number, since it is larger than the sum of its proper divisors (1566105976779).

10211231111221 is a wasteful number, since it uses less digits than its factorization.

10211231111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334948.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 10211231111221 its reverse (12211113211201), we get a palindrome (22422344322422).

The spelling of 10211231111221 in words is "ten trillion, two hundred eleven billion, two hundred thirty-one million, one hundred eleven thousand, two hundred twenty-one".