1020121109984 has 48 divisors (see below), whose sum is σ = 2116928419200. Its totient is φ = 482561172864.

The previous prime is 1020121109977. The next prime is 1020121109999. The reversal of 1020121109984 is 4899011210201.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 685892 + ... + 1584515.

It is an arithmetic number, because the mean of its divisors is an integer number (44102675400).

Almost surely, 2^{1020121109984} is an apocalyptic number.

It is an amenable number.

1020121109984 is an abundant number, since it is smaller than the sum of its proper divisors (1096807309216).

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

1020121109984 is a wasteful number, since it uses less digits than its factorization.

1020121109984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2271175 (or 2271167 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 38.

The spelling of 1020121109984 in words is "one trillion, twenty billion, one hundred twenty-one million, one hundred nine thousand, nine hundred eighty-four".