1103888536921 has 9 divisors (see below), whose sum is σ = 1108180245501. Its totient is φ = 1099613397312.

The previous prime is 1103888536873. The next prime is 1103888536999. The reversal of 1103888536921 is 1296358883011.

The square root of 1103888536921 is 1050661.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 461229781321 + 642658755600 = 679139^2 + 801660^2 .

It is not a de Polignac number, because 1103888536921 - 2¹⁵ = 1103888504153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1103888536321) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 291031201 + ... + 291034993.

It is an arithmetic number, because the mean of its divisors is an integer number (123131138389).

Almost surely, 2^{1103888536921} is an apocalyptic number.

1103888536921 is the 1050661-st square number.

1103888536921 is the 525331-st centered octagonal number.

It is an amenable number.

1103888536921 is a deficient number, since it is larger than the sum of its proper divisors (4291708580).

1103888536921 is an frugal number, since it uses more digits than its factorization.

1103888536921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8140 (or 4070 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 55.

The spelling of 1103888536921 in words is "one trillion, one hundred three billion, eight hundred eighty-eight million, five hundred thirty-six thousand, nine hundred twenty-one".