1111222021021 has 16 divisors (see below), whose sum is σ = 1296245462400. Its totient is φ = 952211621760.

The previous prime is 1111222021009. The next prime is 1111222021027. The reversal of 1111222021021 is 1201202221111.

It is not a de Polignac number, because 1111222021021 - 2¹⁷ = 1111221889949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1111222020986 and 1111222021004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111222021027) 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, 792786 + ... + 1688476.

It is an arithmetic number, because the mean of its divisors is an integer number (81015341400).

Almost surely, 2^{1111222021021} is an apocalyptic number.

It is an amenable number.

1111222021021 is a deficient number, since it is larger than the sum of its proper divisors (185023441379).

1111222021021 is an frugal number, since it uses more digits than its factorization.

1111222021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899329 (or 899315 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1111222021021 its reverse (1201202221111), we get a palindrome (2312424242132).

The spelling of 1111222021021 in words is "one trillion, one hundred eleven billion, two hundred twenty-two million, twenty-one thousand, twenty-one".