126221161233615 has 16 divisors (see below), whose sum is σ = 230804409113088. Its totient is φ = 57701102278176.

The previous prime is 126221161233611. The next prime is 126221161233623. The reversal of 126221161233615 is 516332161122621.

It is not a de Polignac number, because 126221161233615 - 2² = 126221161233611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126221161233611) 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, 601053148627 + ... + 601053148836.

It is an arithmetic number, because the mean of its divisors is an integer number (14425275569568).

Almost surely, 2^{126221161233615} is an apocalyptic number.

126221161233615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

126221161233615 is a deficient number, since it is larger than the sum of its proper divisors (104583247879473).

126221161233615 is a wasteful number, since it uses less digits than its factorization.

126221161233615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202106297478.

The product of its digits is 155520, while the sum is 42.

The spelling of 126221161233615 in words is "one hundred twenty-six trillion, two hundred twenty-one billion, one hundred sixty-one million, two hundred thirty-three thousand, six hundred fifteen".