1121111221021 has 8 divisors (see below), whose sum is σ = 1223252092800. Its totient is φ = 1019007294240.

The previous prime is 1121111220997. The next prime is 1121111221057. The reversal of 1121111221021 is 1201221111211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1121111221021 - 2¹³ = 1121111212829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121111220986 and 1121111221004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121111221091) 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, 9172776 + ... + 9294193.

It is an arithmetic number, because the mean of its divisors is an integer number (152906511600).

Almost surely, 2^{1121111221021} is an apocalyptic number.

1121111221021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1121111221021 is a deficient number, since it is larger than the sum of its proper divisors (102140871779).

1121111221021 is a wasteful number, since it uses less digits than its factorization.

1121111221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18472499.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 1121111221021 its reverse (1201221111211), we get a palindrome (2322332332232).

The spelling of 1121111221021 in words is "one trillion, one hundred twenty-one billion, one hundred eleven million, two hundred twenty-one thousand, twenty-one".