100421745731781 has 8 divisors (see below), whose sum is σ = 134057175648480. Its totient is φ = 66867073151472.

The previous prime is 100421745731759. The next prime is 100421745731807. The reversal of 100421745731781 is 187137547124001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 100421745731781 - 2¹⁹ = 100421745207493 is a prime.

It is a super-2 number, since 2×100421745731781² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100421745731731) 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, 20189331195 + ... + 20189336168.

It is an arithmetic number, because the mean of its divisors is an integer number (16757146956060).

Almost surely, 2^{100421745731781} is an apocalyptic number.

It is an amenable number.

100421745731781 is a deficient number, since it is larger than the sum of its proper divisors (33635429916699).

100421745731781 is an equidigital number, since it uses as much as digits as its factorization.

100421745731781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40378668195.

The product of its (nonzero) digits is 1317120, while the sum is 51.

The spelling of 100421745731781 in words is "one hundred trillion, four hundred twenty-one billion, seven hundred forty-five million, seven hundred thirty-one thousand, seven hundred eighty-one".