1020031221 has 8 divisors (see below), whose sum is σ = 1483681824. Its totient is φ = 618200720.

The previous prime is 1020031211. The next prime is 1020031241. The reversal of 1020031221 is 1221300201.

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 1020031221 - 2¹⁴ = 1020014837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020031197 and 1020031206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020031211) 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, 15454986 + ... + 15455051.

It is an arithmetic number, because the mean of its divisors is an integer number (185460228).

Almost surely, 2^1020031221 is an apocalyptic number.

1020031221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1020031221 is a deficient number, since it is larger than the sum of its proper divisors (463650603).

1020031221 is a wasteful number, since it uses less digits than its factorization.

1020031221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30910051.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1020031221 is about 31937.9276253172. The cubic root of 1020031221 is about 1006.6329799676.

Adding to 1020031221 its reverse (1221300201), we get a palindrome (2241331422).

The spelling of 1020031221 in words is "one billion, twenty million, thirty-one thousand, two hundred twenty-one".