200121212122222 has 4 divisors (see below), whose sum is σ = 300181818183336. Its totient is φ = 100060606061110.

The previous prime is 200121212122217. The next prime is 200121212122241. The reversal of 200121212122222 is 222221212121002.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×200121212122222² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 200121212122193 and 200121212122202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50030303030554 + ... + 50030303030557.

It is an arithmetic number, because the mean of its divisors is an integer number (75045454545834).

Almost surely, 2^{200121212122222} is an apocalyptic number.

200121212122222 is a deficient number, since it is larger than the sum of its proper divisors (100060606061114).

200121212122222 is a wasteful number, since it uses less digits than its factorization.

200121212122222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100060606061113.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 200121212122222 its reverse (222221212121002), we get a palindrome (422342424243224).

The spelling of 200121212122222 in words is "two hundred trillion, one hundred twenty-one billion, two hundred twelve million, one hundred twenty-two thousand, two hundred twenty-two".