1045513121021 has 16 divisors (see below), whose sum is σ = 1076146896000. Its totient is φ = 1015393579200.

The previous prime is 1045513120969. The next prime is 1045513121053. The reversal of 1045513121021 is 1201213155401.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1045513121021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1045513121321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1261475 + ... + 1918943.

It is an arithmetic number, because the mean of its divisors is an integer number (67259181000).

Almost surely, 2^{1045513121021} is an apocalyptic number.

It is an amenable number.

1045513121021 is a deficient number, since it is larger than the sum of its proper divisors (30633774979).

1045513121021 is a wasteful number, since it uses less digits than its factorization.

1045513121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657860.

The product of its (nonzero) digits is 1200, while the sum is 26.

Adding to 1045513121021 its reverse (1201213155401), we get a palindrome (2246726276422).

The spelling of 1045513121021 in words is "one trillion, forty-five billion, five hundred thirteen million, one hundred twenty-one thousand, twenty-one".