1020121141540 has 12 divisors (see below), whose sum is σ = 2142254397276. Its totient is φ = 408048456608.

The previous prime is 1020121141477. The next prime is 1020121141547. The reversal of 1020121141540 is 451411210201.

It is a happy number.

1020121141540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 636050910784 + 384070230756 = 797528^2 + 619734^2 .

It is not an unprimeable number, because it can be changed into a prime (1020121141547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25503028519 + ... + 25503028558.

It is an arithmetic number, because the mean of its divisors is an integer number (178521199773).

Almost surely, 2^{1020121141540} is an apocalyptic number.

1020121141540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020121141540 is an abundant number, since it is smaller than the sum of its proper divisors (1122133255736).

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

1020121141540 is a wasteful number, since it uses less digits than its factorization.

1020121141540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51006057086 (or 51006057084 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 22.

Adding to 1020121141540 its reverse (451411210201), we get a palindrome (1471532351741).

The spelling of 1020121141540 in words is "one trillion, twenty billion, one hundred twenty-one million, one hundred forty-one thousand, five hundred forty".