42121000223100 has 72 divisors (see below), whose sum is σ = 135411215540720. Its totient is φ = 11232266725440.

The previous prime is 42121000223059. The next prime is 42121000223129. The reversal of 42121000223100 is 132200012124.

It is a happy number.

42121000223100 is a `hidden beast` number, since 421 + 2 + 10 + 0 + 0 + 2 + 231 + 0 + 0 = 666.

It is a super-2 number, since 2×42121000223100² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7800182527 + ... + 7800187926.

Almost surely, 2^{42121000223100} is an apocalyptic number.

It is an amenable number.

42121000223100 is an abundant number, since it is smaller than the sum of its proper divisors (93290215317620).

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

42121000223100 is a wasteful number, since it uses less digits than its factorization.

42121000223100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15600370476 (or 15600370463 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 42121000223100 its reverse (132200012124), we get a palindrome (42253200235224).

The spelling of 42121000223100 in words is "forty-two trillion, one hundred twenty-one billion, two hundred twenty-three thousand, one hundred".