1021120533545 has 16 divisors (see below), whose sum is σ = 1400438208000. Its totient is φ = 700174770624.

The previous prime is 1021120533541. The next prime is 1021120533577. The reversal of 1021120533545 is 5453350211201.

It is not a de Polignac number, because 1021120533545 - 2² = 1021120533541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021120533541) 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 15 ways as a sum of consecutive naturals, for example, 700784 + ... + 1591646.

It is an arithmetic number, because the mean of its divisors is an integer number (87527388000).

Almost surely, 2^{1021120533545} is an apocalyptic number.

It is an amenable number.

1021120533545 is a deficient number, since it is larger than the sum of its proper divisors (379317674455).

1021120533545 is an equidigital number, since it uses as much as digits as its factorization.

1021120533545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923624.

The product of its (nonzero) digits is 18000, while the sum is 32.

Adding to 1021120533545 its reverse (5453350211201), we get a palindrome (6474470744746).

The spelling of 1021120533545 in words is "one trillion, twenty-one billion, one hundred twenty million, five hundred thirty-three thousand, five hundred forty-five".