1010121020 has 24 divisors (see below), whose sum is σ = 2122137024. Its totient is φ = 403880256.

The previous prime is 1010120989. The next prime is 1010121037. The reversal of 1010121020 is 201210101.

It is a junction number, because it is equal to n+sod(n) for n = 1010120989 and 1010121007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46214 + ... + 64466.

It is an arithmetic number, because the mean of its divisors is an integer number (88422376).

Almost surely, 2^1010121020 is an apocalyptic number.

1010121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1010121020 is an abundant number, since it is smaller than the sum of its proper divisors (1112016004).

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

1010121020 is a wasteful number, since it uses less digits than its factorization.

1010121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21029 (or 21027 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1010121020 is about 31782.4011050141. The cubic root of 1010121020 is about 1003.3623552297.

Adding to 1010121020 its reverse (201210101), we get a palindrome (1211331121).

The spelling of 1010121020 in words is "one billion, ten million, one hundred twenty-one thousand, twenty".