12261571442 has 16 divisors (see below), whose sum is σ = 18544832064. Its totient is φ = 6080022000.

The previous prime is 12261571433. The next prime is 12261571459. The reversal of 12261571442 is 24417516221.

It is a super-2 number, since 2×12261571442² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 410267 + ... + 439137.

It is an arithmetic number, because the mean of its divisors is an integer number (1159052004).

Almost surely, 2^12261571442 is an apocalyptic number.

12261571442 is a deficient number, since it is larger than the sum of its proper divisors (6283260622).

12261571442 is a wasteful number, since it uses less digits than its factorization.

12261571442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30625.

The product of its digits is 26880, while the sum is 35.

The spelling of 12261571442 in words is "twelve billion, two hundred sixty-one million, five hundred seventy-one thousand, four hundred forty-two".