127721814533930 has 16 divisors (see below), whose sum is σ = 237826827063720. Its totient is φ = 49327045612992.

The previous prime is 127721814533927. The next prime is 127721814533939. The reversal of 127721814533930 is 39335418127721.

It can be written as a sum of positive squares in 4 ways, for example, as 90581797397809 + 37140017136121 = 9517447^2 + 6094261^2 .

It is a super-2 number, since 2×127721814533930² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (127721814533939) 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, 220210024769 + ... + 220210025348.

Almost surely, 2^{127721814533930} is an apocalyptic number.

127721814533930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

127721814533930 is a deficient number, since it is larger than the sum of its proper divisors (110105012529790).

127721814533930 is a wasteful number, since it uses less digits than its factorization.

127721814533930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440420050153.

The product of its (nonzero) digits is 7620480, while the sum is 56.

The spelling of 127721814533930 in words is "one hundred twenty-seven trillion, seven hundred twenty-one billion, eight hundred fourteen million, five hundred thirty-three thousand, nine hundred thirty".