961103021 has 4 divisors (see below), whose sum is σ = 962792700. Its totient is φ = 959413344.

The previous prime is 961102993. The next prime is 961103027. The reversal of 961103021 is 120301169.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 119464900 + 841638121 = 10930^2 + 29011^2 .

It is a cyclic number.

It is not a de Polignac number, because 961103021 - 2⁶ = 961102957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961103027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 843986 + ... + 845123.

It is an arithmetic number, because the mean of its divisors is an integer number (240698175).

Almost surely, 2^961103021 is an apocalyptic number.

It is an amenable number.

961103021 is a deficient number, since it is larger than the sum of its proper divisors (1689679).

961103021 is a wasteful number, since it uses less digits than its factorization.

961103021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689678.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 961103021 is about 31001.6615845022. The cubic root of 961103021 is about 986.8625023047.

The spelling of 961103021 in words is "nine hundred sixty-one million, one hundred three thousand, twenty-one".