1520121120445 has 16 divisors (see below), whose sum is σ = 1825016783040. Its totient is φ = 1215516109824.

The previous prime is 1520121120431. The next prime is 1520121120451. The reversal of 1520121120445 is 5440211210251.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1520121120445 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 145697949 + ... + 145708381.

It is an arithmetic number, because the mean of its divisors is an integer number (114063548940).

Almost surely, 2^{1520121120445} is an apocalyptic number.

It is an amenable number.

1520121120445 is a deficient number, since it is larger than the sum of its proper divisors (304895662595).

1520121120445 is a wasteful number, since it uses less digits than its factorization.

1520121120445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21564.

The product of its (nonzero) digits is 3200, while the sum is 28.

Adding to 1520121120445 its reverse (5440211210251), we get a palindrome (6960332330696).

The spelling of 1520121120445 in words is "one trillion, five hundred twenty billion, one hundred twenty-one million, one hundred twenty thousand, four hundred forty-five".