100121425 has 12 divisors (see below), whose sum is σ = 124714240. Its totient is φ = 79733520.

The previous prime is 100121423. The next prime is 100121429. The reversal of 100121425 is 524121001.

It is not a de Polignac number, because 100121425 - 2¹ = 100121423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100121399 and 100121408.

It is not an unprimeable number, because it can be changed into a prime (100121423) 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, 3405 + ... + 14554.

Almost surely, 2^100121425 is an apocalyptic number.

It is an amenable number.

100121425 is a deficient number, since it is larger than the sum of its proper divisors (24592815).

100121425 is a wasteful number, since it uses less digits than its factorization.

100121425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18192 (or 18187 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 100121425 is about 10006.0694081143. The cubic root of 100121425 is about 464.3466756809.

Adding to 100121425 its reverse (524121001), we get a palindrome (624242426).

The spelling of 100121425 in words is "one hundred million, one hundred twenty-one thousand, four hundred twenty-five".