1101158221 has 16 divisors (see below), whose sum is σ = 1208504880. Its totient is φ = 999060480.

The previous prime is 1101158203. The next prime is 1101158231. The reversal of 1101158221 is 1228511011.

It can be written as a sum of positive squares in 8 ways, for example, as 19669225 + 1081488996 = 4435^2 + 32886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1101158221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1101158192 and 1101158201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101158231) 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, 60531 + ... + 76591.

It is an arithmetic number, because the mean of its divisors is an integer number (75531555).

Almost surely, 2^1101158221 is an apocalyptic number.

It is an amenable number.

1101158221 is a deficient number, since it is larger than the sum of its proper divisors (107346659).

1101158221 is a wasteful number, since it uses less digits than its factorization.

1101158221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16224.

The product of its (nonzero) digits is 160, while the sum is 22.

The square root of 1101158221 is about 33183.7041482713. The cubic root of 1101158221 is about 1032.6422939785.

Adding to 1101158221 its reverse (1228511011), we get a palindrome (2329669232).

It can be divided in two parts, 110115 and 8221, that added together give a square (118336 = 344²).

The spelling of 1101158221 in words is "one billion, one hundred one million, one hundred fifty-eight thousand, two hundred twenty-one".