1021230120 has 64 divisors (see below), whose sum is σ = 3243913920. Its totient is φ = 256308224.

The previous prime is 1021230113. The next prime is 1021230127. The reversal of 1021230120 is 210321201.

It is an interprime number because it is at equal distance from previous prime (1021230113) and next prime (1021230127).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1021230096 and 1021230105.

It is not an unprimeable number, because it can be changed into a prime (1021230127) 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 15 ways as a sum of consecutive naturals, for example, 248262 + ... + 252341.

It is an arithmetic number, because the mean of its divisors is an integer number (50686155).

Almost surely, 2^1021230120 is an apocalyptic number.

1021230120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021230120 is an abundant number, since it is smaller than the sum of its proper divisors (2222683800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021230120 is a wasteful number, since it uses less digits than its factorization.

1021230120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500634 (or 500630 counting only the distinct ones).

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

The square root of 1021230120 is about 31956.6913180949. The cubic root of 1021230120 is about 1007.0272093240.

Adding to 1021230120 its reverse (210321201), we get a palindrome (1231551321).

The spelling of 1021230120 in words is "one billion, twenty-one million, two hundred thirty thousand, one hundred twenty".