100742046452421 has 12 divisors (see below), whose sum is σ = 147643990944576. Its totient is φ = 61055785728520.

The previous prime is 100742046452389. The next prime is 100742046452459. The reversal of 100742046452421 is 124254640247001.

It is a happy number.

It is not a de Polignac number, because 100742046452421 - 2⁵ = 100742046452389 is a prime.

It is a super-2 number, since 2×100742046452421² (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 (100742046452821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138763149021 + ... + 138763149746.

It is an arithmetic number, because the mean of its divisors is an integer number (12303665912048).

Almost surely, 2^{100742046452421} is an apocalyptic number.

100742046452421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

100742046452421 is a deficient number, since it is larger than the sum of its proper divisors (46901944492155).

100742046452421 is a wasteful number, since it uses less digits than its factorization.

100742046452421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277526298792 (or 277526298781 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 42.

Adding to 100742046452421 its reverse (124254640247001), we get a palindrome (224996686699422).

The spelling of 100742046452421 in words is "one hundred trillion, seven hundred forty-two billion, forty-six million, four hundred fifty-two thousand, four hundred twenty-one".