1012011121020 has 48 divisors (see below), whose sum is σ = 2860113691008. Its totient is φ = 267347484480.

The previous prime is 1012011121001. The next prime is 1012011121021. The reversal of 1012011121020 is 201211102101.

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

It is a junction number, because it is equal to n+sod(n) for n = 1012011120987 and 1012011121005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012011121021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78810646 + ... + 78823485.

It is an arithmetic number, because the mean of its divisors is an integer number (59585701896).

Almost surely, 2^{1012011121020} is an apocalyptic number.

1012011121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012011121020 is an abundant number, since it is smaller than the sum of its proper divisors (1848102569988).

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

1012011121020 is a wasteful number, since it uses less digits than its factorization.

1012011121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157634250 (or 157634248 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1012011121020 its reverse (201211102101), we get a palindrome (1213222223121).

It can be divided in two parts, 101201 and 1121020, that added together give a palindrome (1222221).

The spelling of 1012011121020 in words is "one trillion, twelve billion, eleven million, one hundred twenty-one thousand, twenty".