1125451021641 has 16 divisors (see below), whose sum is σ = 1590250146624. Its totient is φ = 705552850944.

The previous prime is 1125451021627. The next prime is 1125451021687. The reversal of 1125451021641 is 1461201545211.

It is not a de Polignac number, because 1125451021641 - 2¹⁸ = 1125450759497 is a prime.

It is a super-2 number, since 2×1125451021641² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1125451021841) 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, 9510871 + ... + 9628476.

It is an arithmetic number, because the mean of its divisors is an integer number (99390634164).

Almost surely, 2^{1125451021641} is an apocalyptic number.

It is an amenable number.

1125451021641 is a deficient number, since it is larger than the sum of its proper divisors (464799124983).

1125451021641 is a wasteful number, since it uses less digits than its factorization.

1125451021641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19140520.

The product of its (nonzero) digits is 9600, while the sum is 33.

Adding to 1125451021641 its reverse (1461201545211), we get a palindrome (2586652566852).

The spelling of 1125451021641 in words is "one trillion, one hundred twenty-five billion, four hundred fifty-one million, twenty-one thousand, six hundred forty-one".