1121620501 has 8 divisors (see below), whose sum is σ = 1161315000. Its totient is φ = 1081993920.

The previous prime is 1121620499. The next prime is 1121620523. The reversal of 1121620501 is 1050261211.

It can be written as a sum of positive squares in 4 ways, for example, as 280562500 + 841058001 = 16750^2 + 29001^2 .

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 1121620501 - 2¹ = 1121620499 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 (1121620541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17875 + ... + 50623.

It is an arithmetic number, because the mean of its divisors is an integer number (145164375).

Almost surely, 2^1121620501 is an apocalyptic number.

It is an amenable number.

1121620501 is a deficient number, since it is larger than the sum of its proper divisors (39694499).

1121620501 is a wasteful number, since it uses less digits than its factorization.

1121620501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33959.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 1121620501 is about 33490.6031746220. The cubic root of 1121620501 is about 1038.9994386396. Note that the first 3 decimals are identical.

Adding to 1121620501 its reverse (1050261211), we get a palindrome (2171881712).

The spelling of 1121620501 in words is "one billion, one hundred twenty-one million, six hundred twenty thousand, five hundred one".