1002121211020 has 48 divisors (see below), whose sum is σ = 2116464537600. Its totient is φ = 398563602624.

The previous prime is 1002121211017. The next prime is 1002121211023. The reversal of 1002121211020 is 201121212001.

It is an interprime number because it is at equal distance from previous prime (1002121211017) and next prime (1002121211023).

It is not an unprimeable number, because it can be changed into a prime (1002121211023) 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, 5833597 + ... + 6002923.

It is an arithmetic number, because the mean of its divisors is an integer number (44093011200).

Almost surely, 2^{1002121211020} is an apocalyptic number.

1002121211020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002121211020 is an abundant number, since it is smaller than the sum of its proper divisors (1114343326580).

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

1002121211020 is a wasteful number, since it uses less digits than its factorization.

1002121211020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171022 (or 171020 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1002121211020 its reverse (201121212001), we get a palindrome (1203242423021).

The spelling of 1002121211020 in words is "one trillion, two billion, one hundred twenty-one million, two hundred eleven thousand, twenty".