126420221542 has 4 divisors (see below), whose sum is σ = 189630332316. Its totient is φ = 63210110770.

The previous prime is 126420221527. The next prime is 126420221573. The reversal of 126420221542 is 245122024621.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31605055384 + ... + 31605055387.

It is an arithmetic number, because the mean of its divisors is an integer number (47407583079).

Almost surely, 2^126420221542 is an apocalyptic number.

126420221542 is a deficient number, since it is larger than the sum of its proper divisors (63210110774).

126420221542 is an equidigital number, since it uses as much as digits as its factorization.

126420221542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63210110773.

The product of its (nonzero) digits is 15360, while the sum is 31.

The spelling of 126420221542 in words is "one hundred twenty-six billion, four hundred twenty million, two hundred twenty-one thousand, five hundred forty-two".