1111221302121 has 64 divisors (see below), whose sum is σ = 1894501539840. Its totient is φ = 630575668800.

The previous prime is 1111221302083. The next prime is 1111221302131. The reversal of 1111221302121 is 1212031221111.

It is a happy number.

1111221302121 is a `hidden beast` number, since 11 + 11 + 221 + 302 + 121 = 666.

It is not a de Polignac number, because 1111221302121 - 2¹⁸ = 1111221039977 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1111221302094 and 1111221302103.

It is not an unprimeable number, because it can be changed into a prime (1111221302131) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 165037671 + ... + 165044403.

It is an arithmetic number, because the mean of its divisors is an integer number (29601586560).

Almost surely, 2^{1111221302121} is an apocalyptic number.

It is an amenable number.

1111221302121 is a deficient number, since it is larger than the sum of its proper divisors (783280237719).

1111221302121 is a wasteful number, since it uses less digits than its factorization.

1111221302121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12683 (or 12677 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 1111221302121 its reverse (1212031221111), we get a palindrome (2323252523232).

The spelling of 1111221302121 in words is "one trillion, one hundred eleven billion, two hundred twenty-one million, three hundred two thousand, one hundred twenty-one".