1102021121 has 4 divisors (see below), whose sum is σ = 1102588500. Its totient is φ = 1101453744.

The previous prime is 1102021111. The next prime is 1102021127. The reversal of 1102021121 is 1211202011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 961930225 + 140090896 = 31015^2 + 11836^2 .

It is a cyclic number.

It is not a de Polignac number, because 1102021121 - 2²⁶ = 1034912257 is a prime.

It is a super-2 number, since 2×1102021121² = 2428901102260193282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1102021127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280766 + ... + 284663.

It is an arithmetic number, because the mean of its divisors is an integer number (275647125).

Almost surely, 2^1102021121 is an apocalyptic number.

It is an amenable number.

1102021121 is a deficient number, since it is larger than the sum of its proper divisors (567379).

1102021121 is an equidigital number, since it uses as much as digits as its factorization.

1102021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567378.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1102021121 is about 33196.7034658564. The cubic root of 1102021121 is about 1032.9119598522.

Adding to 1102021121 its reverse (1211202011), we get a palindrome (2313223132).

The spelling of 1102021121 in words is "one billion, one hundred two million, twenty-one thousand, one hundred twenty-one".