200420121 has 16 divisors (see below), whose sum is σ = 291944448. Its totient is φ = 121290000.

The previous prime is 200420107. The next prime is 200420147. The reversal of 200420121 is 121024002.

It is not a de Polignac number, because 200420121 - 2¹⁰ = 200419097 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 200420097 and 200420106.

It is not an unprimeable number, because it can be changed into a prime (200420161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20740 + ... + 28826.

It is an arithmetic number, because the mean of its divisors is an integer number (18246528).

Almost surely, 2^200420121 is an apocalyptic number.

It is an amenable number.

200420121 is a deficient number, since it is larger than the sum of its proper divisors (91524327).

200420121 is a wasteful number, since it uses less digits than its factorization.

200420121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8852.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 200420121 is about 14156.9813519691. The cubic root of 200420121 is about 585.2127416766.

Adding to 200420121 its reverse (121024002), we get a palindrome (321444123).

The spelling of 200420121 in words is "two hundred million, four hundred twenty thousand, one hundred twenty-one".