1020021121 has 8 divisors (see below), whose sum is σ = 1167556544. Its totient is φ = 872940240.

The previous prime is 1020020983. The next prime is 1020021127. The reversal of 1020021121 is 1211200201.

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 1020021121 - 2¹⁵ = 1019988353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020021098 and 1020021107.

It is not an unprimeable number, because it can be changed into a prime (1020021127) 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, 108810 + ... + 117811.

It is an arithmetic number, because the mean of its divisors is an integer number (145944568).

Almost surely, 2^1020021121 is an apocalyptic number.

It is an amenable number.

1020021121 is a deficient number, since it is larger than the sum of its proper divisors (147535423).

1020021121 is an equidigital number, since it uses as much as digits as its factorization.

1020021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227271.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1020021121 is about 31937.7695057122. The cubic root of 1020021121 is about 1006.6296575116.

Adding to 1020021121 its reverse (1211200201), we get a palindrome (2231221322).

The spelling of 1020021121 in words is "one billion, twenty million, twenty-one thousand, one hundred twenty-one".