123011156245 has 8 divisors (see below), whose sum is σ = 147623079384. Its totient is φ = 98402463744.

The previous prime is 123011156231. The next prime is 123011156249. The reversal of 123011156245 is 542651110321.

It can be written as a sum of positive squares in 4 ways, for example, as 68714233956 + 54296922289 = 262134^2 + 233017^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123011156245 - 2²¹ = 123009059093 is a prime.

It is a super-5 number, since 5×123011156245⁵ (a number of 57 digits) contains 55555 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 (123011156249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 723084 + ... + 876853.

It is an arithmetic number, because the mean of its divisors is an integer number (18452884923).

Almost surely, 2^123011156245 is an apocalyptic number.

It is an amenable number.

123011156245 is a deficient number, since it is larger than the sum of its proper divisors (24611923139).

123011156245 is a wasteful number, since it uses less digits than its factorization.

123011156245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1615319.

The product of its (nonzero) digits is 7200, while the sum is 31.

Adding to 123011156245 its reverse (542651110321), we get a palindrome (665662266566).

The spelling of 123011156245 in words is "one hundred twenty-three billion, eleven million, one hundred fifty-six thousand, two hundred forty-five".