1001220032121 has 8 divisors (see below), whose sum is σ = 1378023270144. Its totient is φ = 645948407760.

The previous prime is 1001220032083. The next prime is 1001220032207. The reversal of 1001220032121 is 1212300221001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1001220032121 - 2⁷ = 1001220031993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1001220032121.

It is not an unprimeable number, because it can be changed into a prime (1001220032921) 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, 5382903306 + ... + 5382903491.

It is an arithmetic number, because the mean of its divisors is an integer number (172252908768).

Almost surely, 2^{1001220032121} is an apocalyptic number.

It is an amenable number.

1001220032121 is a deficient number, since it is larger than the sum of its proper divisors (376803238023).

1001220032121 is a wasteful number, since it uses less digits than its factorization.

1001220032121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10765806831.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 1001220032121 its reverse (1212300221001), we get a palindrome (2213520253122).

The spelling of 1001220032121 in words is "one trillion, one billion, two hundred twenty million, thirty-two thousand, one hundred twenty-one".