1020121111504 has 40 divisors (see below), whose sum is σ = 2269647456480. Its totient is φ = 439286601600.

The previous prime is 1020121111403. The next prime is 1020121111507. The reversal of 1020121111504 is 4051111210201.

It is a super-2 number, since 2×1020121111504² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020121111507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152526727 + ... + 152533414.

It is an arithmetic number, because the mean of its divisors is an integer number (56741186412).

Almost surely, 2^{1020121111504} is an apocalyptic number.

It is an amenable number.

1020121111504 is an abundant number, since it is smaller than the sum of its proper divisors (1249526344976).

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

1020121111504 is a wasteful number, since it uses less digits than its factorization.

1020121111504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305060179 (or 305060173 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 19.

Adding to 1020121111504 its reverse (4051111210201), we get a palindrome (5071232321705).

The spelling of 1020121111504 in words is "one trillion, twenty billion, one hundred twenty-one million, one hundred eleven thousand, five hundred four".