1101551321 has 8 divisors (see below), whose sum is σ = 1187969160. Its totient is φ = 1015373952.

The previous prime is 1101551291. The next prime is 1101551327. The reversal of 1101551321 is 1231551011.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8323225 + 1093228096 = 2885^2 + 33064^2 .

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 1101551321 - 2⁶ = 1101551257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1101551293 and 1101551302.

It is not an unprimeable number, because it can be changed into a prime (1101551327) 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, 50540 + ... + 68973.

It is an arithmetic number, because the mean of its divisors is an integer number (148496145).

Almost surely, 2^1101551321 is an apocalyptic number.

It is an amenable number.

1101551321 is a deficient number, since it is larger than the sum of its proper divisors (86417839).

1101551321 is a wasteful number, since it uses less digits than its factorization.

1101551321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120235.

The product of its (nonzero) digits is 150, while the sum is 20.

The square root of 1101551321 is about 33189.6267077531. The cubic root of 1101551321 is about 1032.7651595768.

The spelling of 1101551321 in words is "one billion, one hundred one million, five hundred fifty-one thousand, three hundred twenty-one".