1102121221 has 8 divisors (see below), whose sum is σ = 1120743000. Its totient is φ = 1083517440.

The previous prime is 1102121173. The next prime is 1102121243. The reversal of 1102121221 is 1221212011.

It can be written as a sum of positive squares in 4 ways, for example, as 70812225 + 1031308996 = 8415^2 + 32114^2 .

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 1102121221 - 2¹³ = 1102113029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1102121281) 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, 185505 + ... + 191353.

It is an arithmetic number, because the mean of its divisors is an integer number (140092875).

Almost surely, 2^1102121221 is an apocalyptic number.

It is an amenable number.

1102121221 is a deficient number, since it is larger than the sum of its proper divisors (18621779).

1102121221 is an equidigital number, since it uses as much as digits as its factorization.

1102121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8999.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1102121221 is about 33198.2111114439. The cubic root of 1102121221 is about 1032.9432331054.

Adding to 1102121221 its reverse (1221212011), we get a palindrome (2323333232).

The spelling of 1102121221 in words is "one billion, one hundred two million, one hundred twenty-one thousand, two hundred twenty-one".