126721962432031 has 2 divisors, whose sum is σ = 126721962432032. Its totient is φ = 126721962432030.

The previous prime is 126721962431963. The next prime is 126721962432101. The reversal of 126721962432031 is 130234269127621.

It is a weak prime.

It is an emirp because it is prime and its reverse (130234269127621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126721962432031 - 2⁷ = 126721962431903 is a prime.

It is a super-2 number, since 2×126721962432031² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126721962432631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63360981216015 + 63360981216016.

It is an arithmetic number, because the mean of its divisors is an integer number (63360981216016).

Almost surely, 2^{126721962432031} is an apocalyptic number.

126721962432031 is a deficient number, since it is larger than the sum of its proper divisors (1).

126721962432031 is an equidigital number, since it uses as much as digits as its factorization.

126721962432031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 49.

The spelling of 126721962432031 in words is "one hundred twenty-six trillion, seven hundred twenty-one billion, nine hundred sixty-two million, four hundred thirty-two thousand, thirty-one".