200211212112121 has 6 divisors (see below), whose sum is σ = 232898756946810. Its totient is φ = 171609610381776.

The previous prime is 200211212112011. The next prime is 200211212112137. The reversal of 200211212112121 is 121211212112002.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 183831295233600 + 16379916878521 = 13558440^2 + 4047211^2 .

It is not a de Polignac number, because 200211212112121 - 2⁷ = 200211212111993 is a prime.

It is a super-2 number, since 2×200211212112121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200211212112181) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2042971552116 + ... + 2042971552213.

It is an arithmetic number, because the mean of its divisors is an integer number (38816459491135).

Almost surely, 2^{200211212112121} is an apocalyptic number.

It is an amenable number.

200211212112121 is a deficient number, since it is larger than the sum of its proper divisors (32687544834689).

200211212112121 is an equidigital number, since it uses as much as digits as its factorization.

200211212112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4085943104343 (or 4085943104336 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 200211212112121 its reverse (121211212112002), we get a palindrome (321422424224123).

The spelling of 200211212112121 in words is "two hundred trillion, two hundred eleven billion, two hundred twelve million, one hundred twelve thousand, one hundred twenty-one".