200121212011 has 32 divisors (see below), whose sum is σ = 248133312000. Its totient is φ = 157567576320.

The previous prime is 200121211967. The next prime is 200121212023. The reversal of 200121212011 is 110212121002.

It is not a de Polignac number, because 200121212011 - 2¹⁵ = 200121179243 is a prime.

It is a super-2 number, since 2×200121212011² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 200121211982 and 200121212000.

It is not an unprimeable number, because it can be changed into a prime (200121212041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 776265 + ... + 1001413.

It is an arithmetic number, because the mean of its divisors is an integer number (7754166000).

Almost surely, 2^200121212011 is an apocalyptic number.

200121212011 is a deficient number, since it is larger than the sum of its proper divisors (48012099989).

200121212011 is a wasteful number, since it uses less digits than its factorization.

200121212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225379.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 200121212011 its reverse (110212121002), we get a palindrome (310333333013).

The spelling of 200121212011 in words is "two hundred billion, one hundred twenty-one million, two hundred twelve thousand, eleven".