1123101256261 has 16 divisors (see below), whose sum is σ = 1135591228800. Its totient is φ = 1110649883328.

The previous prime is 1123101256229. The next prime is 1123101256301. The reversal of 1123101256261 is 1626521013211.

It is a cyclic number.

It is not a de Polignac number, because 1123101256261 - 2⁵ = 1123101256229 is a prime.

It is a super-2 number, since 2×1123101256261² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123101256861) 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, 302802475 + ... + 302806183.

It is an arithmetic number, because the mean of its divisors is an integer number (70974451800).

Almost surely, 2^{1123101256261} is an apocalyptic number.

It is an amenable number.

1123101256261 is a deficient number, since it is larger than the sum of its proper divisors (12489972539).

1123101256261 is a wasteful number, since it uses less digits than its factorization.

1123101256261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8028.

The product of its (nonzero) digits is 4320, while the sum is 31.

Adding to 1123101256261 its reverse (1626521013211), we get a palindrome (2749622269472).

The spelling of 1123101256261 in words is "one trillion, one hundred twenty-three billion, one hundred one million, two hundred fifty-six thousand, two hundred sixty-one".