12261261210511 has 8 divisors (see below), whose sum is σ = 12264309550080. Its totient is φ = 12258213083928.

The previous prime is 12261261210509. The next prime is 12261261210613. The reversal of 12261261210511 is 11501216216221.

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 12261261210511 - 2¹ = 12261261210509 is a prime.

It is a super-2 number, since 2×12261261210511² (a number of 27 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 (12261261217511) 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, 219633160 + ... + 219688978.

It is an arithmetic number, because the mean of its divisors is an integer number (1533038693760).

Almost surely, 2^{12261261210511} is an apocalyptic number.

12261261210511 is a deficient number, since it is larger than the sum of its proper divisors (3048339569).

12261261210511 is an equidigital number, since it uses as much as digits as its factorization.

12261261210511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106493.

The product of its (nonzero) digits is 2880, while the sum is 31.

Adding to 12261261210511 its reverse (11501216216221), we get a palindrome (23762477426732).

The spelling of 12261261210511 in words is "twelve trillion, two hundred sixty-one billion, two hundred sixty-one million, two hundred ten thousand, five hundred eleven".