1020221121 has 8 divisors (see below), whose sum is σ = 1363247424. Its totient is φ = 678671120.

The previous prime is 1020221113. The next prime is 1020221123. The reversal of 1020221121 is 1211220201.

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 1020221121 - 2³ = 1020221113 is a prime.

It is a super-2 number, since 2×1020221121² = 2081702271468993282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1020221097 and 1020221106.

It is not an unprimeable number, because it can be changed into a prime (1020221123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367461 + ... + 370226.

It is an arithmetic number, because the mean of its divisors is an integer number (170405928).

Almost surely, 2^1020221121 is an apocalyptic number.

It is an amenable number.

1020221121 is a deficient number, since it is larger than the sum of its proper divisors (343026303).

1020221121 is an equidigital number, since it uses as much as digits as its factorization.

1020221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738151.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1020221121 is about 31940.9004412837. The cubic root of 1020221121 is about 1006.6954446378.

Adding to 1020221121 its reverse (1211220201), we get a palindrome (2231441322).

The spelling of 1020221121 in words is "one billion, twenty million, two hundred twenty-one thousand, one hundred twenty-one".