1000010121020 has 48 divisors (see below), whose sum is σ = 2125974422880. Its totient is φ = 395083747584.

The previous prime is 1000010121017. The next prime is 1000010121029. The reversal of 1000010121020 is 201210100001.

It is a junction number, because it is equal to n+sod(n) for n = 1000010120989 and 1000010121007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000010121029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32474 + ... + 1414593.

It is an arithmetic number, because the mean of its divisors is an integer number (44291133810).

Almost surely, 2^{1000010121020} is an apocalyptic number.

1000010121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000010121020 is an abundant number, since it is smaller than the sum of its proper divisors (1125964301860).

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

1000010121020 is a wasteful number, since it uses less digits than its factorization.

1000010121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447502 (or 1447500 counting only the distinct ones).

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

Adding to 1000010121020 its reverse (201210100001), we get a palindrome (1201220221021).

The spelling of 1000010121020 in words is "one trillion, ten million, one hundred twenty-one thousand, twenty".