1020020121012 has 48 divisors (see below), whose sum is σ = 2385159436800. Its totient is φ = 339276571488.

The previous prime is 1020020121011. The next prime is 1020020121041. The reversal of 1020020121012 is 2101210200201.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020020121011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59645239 + ... + 59662337.

It is an arithmetic number, because the mean of its divisors is an integer number (49690821600).

Almost surely, 2^{1020020121012} is an apocalyptic number.

1020020121012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1020020121012 is an abundant number, since it is smaller than the sum of its proper divisors (1365139315788).

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

1020020121012 is a wasteful number, since it uses less digits than its factorization.

1020020121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27492 (or 27490 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1020020121012 its reverse (2101210200201), we get a palindrome (3121230321213).

It can be divided in two parts, 10200201 and 21012, that multiplied together give a palindrome (214326623412).

The spelling of 1020020121012 in words is "one trillion, twenty billion, twenty million, one hundred twenty-one thousand, twelve".