1020121010523 has 8 divisors (see below), whose sum is σ = 1511290386000. Its totient is φ = 680080673664.

The previous prime is 1020121010479. The next prime is 1020121010527. The reversal of 1020121010523 is 3250101210201.

1020121010523 is a `hidden beast` number, since 1 + 0 + 20 + 121 + 0 + 1 + 0 + 523 = 666.

It is not a de Polignac number, because 1020121010523 - 2¹⁸ = 1020120748379 is a prime.

It is a super-2 number, since 2×1020121010523² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1020121010496 and 1020121010505.

It is not an unprimeable number, because it can be changed into a prime (1020121010527) 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, 18891129798 + ... + 18891129851.

It is an arithmetic number, because the mean of its divisors is an integer number (188911298250).

Almost surely, 2^{1020121010523} is an apocalyptic number.

1020121010523 is a deficient number, since it is larger than the sum of its proper divisors (491169375477).

1020121010523 is an equidigital number, since it uses as much as digits as its factorization.

1020121010523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37782259658 (or 37782259652 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 1020121010523 its reverse (3250101210201), we get a palindrome (4270222220724).

The spelling of 1020121010523 in words is "one trillion, twenty billion, one hundred twenty-one million, ten thousand, five hundred twenty-three".