200020111121221 has 4 divisors (see below), whose sum is σ = 200020251971232. Its totient is φ = 200019970271212.

The previous prime is 200020111121197. The next prime is 200020111121269. The reversal of 200020111121221 is 122121111020002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 200020111121221 - 2¹⁵ = 200020111088453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200020111121195 and 200020111121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200020111121521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68272945 + ... + 71142358.

It is an arithmetic number, because the mean of its divisors is an integer number (50005062992808).

Almost surely, 2^{200020111121221} is an apocalyptic number.

It is an amenable number.

200020111121221 is a deficient number, since it is larger than the sum of its proper divisors (140850011).

200020111121221 is a wasteful number, since it uses less digits than its factorization.

200020111121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140850010.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 200020111121221 its reverse (122121111020002), we get a palindrome (322141222141223).

The spelling of 200020111121221 in words is "two hundred trillion, twenty billion, one hundred eleven million, one hundred twenty-one thousand, two hundred twenty-one".