1101212321 has 16 divisors (see below), whose sum is σ = 1223011008. Its totient is φ = 983083200.

The previous prime is 1101212291. The next prime is 1101212339. The reversal of 1101212321 is 1232121011.

It is not a de Polignac number, because 1101212321 - 2¹⁴ = 1101195937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1101212296 and 1101212305.

It is not an unprimeable number, because it can be changed into a prime (1101212341) 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, 634571 + ... + 636303.

It is an arithmetic number, because the mean of its divisors is an integer number (76438188).

Almost surely, 2^1101212321 is an apocalyptic number.

1101212321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1101212321 is a deficient number, since it is larger than the sum of its proper divisors (121798687).

1101212321 is a wasteful number, since it uses less digits than its factorization.

1101212321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2752.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1101212321 is about 33184.5192974073. The cubic root of 1101212321 is about 1032.6592049704.

Adding to 1101212321 its reverse (1232121011), we get a palindrome (2333333332).

The spelling of 1101212321 in words is "one billion, one hundred one million, two hundred twelve thousand, three hundred twenty-one".