1161622021 has 8 divisors (see below), whose sum is σ = 1327782080. Its totient is φ = 995515488.

The previous prime is 1161621997. The next prime is 1161622079. The reversal of 1161622021 is 1202261611.

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 1161622021 - 2¹¹ = 1161619973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1161621983 and 1161622001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161620021) 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, 59890 + ... + 76876.

It is an arithmetic number, because the mean of its divisors is an integer number (165972760).

Almost surely, 2^1161622021 is an apocalyptic number.

It is an amenable number.

1161622021 is a deficient number, since it is larger than the sum of its proper divisors (166160059).

1161622021 is an equidigital number, since it uses as much as digits as its factorization.

1161622021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26763.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1161622021 is about 34082.5765017846. The cubic root of 1161622021 is about 1051.2070837581.

Adding to 1161622021 its reverse (1202261611), we get a palindrome (2363883632).

The spelling of 1161622021 in words is "one billion, one hundred sixty-one million, six hundred twenty-two thousand, twenty-one".