211121321102021 has 16 divisors (see below), whose sum is σ = 232709826305088. Its totient is φ = 189933976512000.

The previous prime is 211121321101937. The next prime is 211121321102033. The reversal of 211121321102021 is 120201123121112.

It is a cyclic number.

It is not a de Polignac number, because 211121321102021 - 2³⁸ = 210846443195077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211121321101984 and 211121321102002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121321102521) 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, 44865755 + ... + 49347528.

It is an arithmetic number, because the mean of its divisors is an integer number (14544364144068).

Almost surely, 2^{211121321102021} is an apocalyptic number.

It is an amenable number.

211121321102021 is a deficient number, since it is larger than the sum of its proper divisors (21588505203067).

211121321102021 is a wasteful number, since it uses less digits than its factorization.

211121321102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94215412.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 211121321102021 its reverse (120201123121112), we get a palindrome (331322444223133).

The spelling of 211121321102021 in words is "two hundred eleven trillion, one hundred twenty-one billion, three hundred twenty-one million, one hundred two thousand, twenty-one".