211001000212121 has 16 divisors (see below), whose sum is σ = 242217417778560. Its totient is φ = 180053010119040.

The previous prime is 211001000212111. The next prime is 211001000212157. The reversal of 211001000212121 is 121212000100112.

It is a cyclic number.

It is not a de Polignac number, because 211001000212121 - 2¹⁰ = 211001000211097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211001000212096 and 211001000212105.

It is not an unprimeable number, because it can be changed into a prime (211001000212111) 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, 31734575 + ... + 37803243.

It is an arithmetic number, because the mean of its divisors is an integer number (15138588611160).

Almost surely, 2^{211001000212121} is an apocalyptic number.

It is an amenable number.

211001000212121 is a deficient number, since it is larger than the sum of its proper divisors (31216417566439).

211001000212121 is a wasteful number, since it uses less digits than its factorization.

211001000212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6090784.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 211001000212121 its reverse (121212000100112), we get a palindrome (332213000312233).

The spelling of 211001000212121 in words is "two hundred eleven trillion, one billion, two hundred twelve thousand, one hundred twenty-one".