1030121020 has 12 divisors (see below), whose sum is σ = 2163254184. Its totient is φ = 412048400.

The previous prime is 1030121009. The next prime is 1030121039. The reversal of 1030121020 is 201210301.

It is a super-2 number, since 2×1030121020² = 2122298631691680800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1030120988 and 1030121006.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 25753006 + ... + 25753045.

It is an arithmetic number, because the mean of its divisors is an integer number (180271182).

Almost surely, 2^1030121020 is an apocalyptic number.

1030121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1030121020 is an abundant number, since it is smaller than the sum of its proper divisors (1133133164).

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

1030121020 is a wasteful number, since it uses less digits than its factorization.

1030121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51506060 (or 51506058 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1030121020 is about 32095.4984382545. The cubic root of 1030121020 is about 1009.9411853475.

Adding to 1030121020 its reverse (201210301), we get a palindrome (1231331321).

The spelling of 1030121020 in words is "one billion, thirty million, one hundred twenty-one thousand, twenty".