1101021243 has 16 divisors (see below), whose sum is σ = 1706184960. Its totient is φ = 618490656.

The previous prime is 1101021241. The next prime is 1101021277. The reversal of 1101021243 is 3421201011.

It is not a de Polignac number, because 1101021243 - 2¹ = 1101021241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1101021241) 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, 443080 + ... + 445557.

It is an arithmetic number, because the mean of its divisors is an integer number (106636560).

Almost surely, 2^1101021243 is an apocalyptic number.

1101021243 is a deficient number, since it is larger than the sum of its proper divisors (605163717).

1101021243 is an equidigital number, since it uses as much as digits as its factorization.

1101021243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888706.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1101021243 is about 33181.6401493356. The cubic root of 1101021243 is about 1032.5994738705.

Adding to 1101021243 its reverse (3421201011), we get a palindrome (4522222254).

The spelling of 1101021243 in words is "one billion, one hundred one million, twenty-one thousand, two hundred forty-three".