1102211021 has 4 divisors (see below), whose sum is σ = 1102841532. Its totient is φ = 1101580512.

The previous prime is 1102211009. The next prime is 1102211027. The reversal of 1102211021 is 1201122011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1201122011 = 199 ⋅6035789.

It can be written as a sum of positive squares in 2 ways, for example, as 164994025 + 937216996 = 12845^2 + 30614^2 .

It is a cyclic number.

It is not a de Polignac number, because 1102211021 - 2¹⁴ = 1102194637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1102210993 and 1102211011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1102211027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312626 + ... + 316131.

It is an arithmetic number, because the mean of its divisors is an integer number (275710383).

Almost surely, 2^1102211021 is an apocalyptic number.

It is an amenable number.

1102211021 is a deficient number, since it is larger than the sum of its proper divisors (630511).

1102211021 is an equidigital number, since it uses as much as digits as its factorization.

1102211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630510.

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

The square root of 1102211021 is about 33199.5635664085. The cubic root of 1102211021 is about 1032.9712868202.

Adding to 1102211021 its reverse (1201122011), we get a palindrome (2303333032).

The spelling of 1102211021 in words is "one billion, one hundred two million, two hundred eleven thousand, twenty-one".