1011231103221 has 8 divisors (see below), whose sum is σ = 1498120152960. Its totient is φ = 674154068796.

The previous prime is 1011231103187. The next prime is 1011231103249. The reversal of 1011231103221 is 1223011321101.

1011231103221 is a `hidden beast` number, since 101 + 1 + 231 + 10 + 322 + 1 = 666.

1011231103221 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1011231103221 - 2¹⁴ = 1011231086837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1011231103194 and 1011231103203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011231103271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18726501885 + ... + 18726501938.

It is an arithmetic number, because the mean of its divisors is an integer number (187265019120).

Almost surely, 2^{1011231103221} is an apocalyptic number.

It is an amenable number.

1011231103221 is a deficient number, since it is larger than the sum of its proper divisors (486889049739).

1011231103221 is an equidigital number, since it uses as much as digits as its factorization.

1011231103221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37453003832 (or 37453003826 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1011231103221 its reverse (1223011321101), we get a palindrome (2234242424322).

The spelling of 1011231103221 in words is "one trillion, eleven billion, two hundred thirty-one million, one hundred three thousand, two hundred twenty-one".