100520204021442 has 12 divisors (see below), whose sum is σ = 217793775379830. Its totient is φ = 33506734673808.

The previous prime is 100520204021431. The next prime is 100520204021449. The reversal of 100520204021442 is 244120402025001.

It is a happy number.

100520204021442 is a `hidden beast` number, since 1 + 0 + 0 + 5 + 202 + 0 + 402 + 14 + 42 = 666.

It can be written as a sum of positive squares in only one way, i.e., 100060589174841 + 459614846601 = 10003029^2 + 677949^2 .

It is a super-2 number, since 2×100520204021442² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (100520204021449) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2792227889467 + ... + 2792227889502.

Almost surely, 2^{100520204021442} is an apocalyptic number.

100520204021442 is an abundant number, since it is smaller than the sum of its proper divisors (117273571358388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100520204021442 is a wasteful number, since it uses less digits than its factorization.

100520204021442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5584455778977 (or 5584455778974 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

Adding to 100520204021442 its reverse (244120402025001), we get a palindrome (344640606046443).

The spelling of 100520204021442 in words is "one hundred trillion, five hundred twenty billion, two hundred four million, twenty-one thousand, four hundred forty-two".