211121020222221 has 16 divisors (see below), whose sum is σ = 284860862320320. Its totient is φ = 139073484850560.

The previous prime is 211121020222201. The next prime is 211121020222241. The reversal of 211121020222221 is 122222020121112.

It is an interprime number because it is at equal distance from previous prime (211121020222201) and next prime (211121020222241).

It is not a de Polignac number, because 211121020222221 - 2⁷ = 211121020222093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121020222201) 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, 1152705886 + ... + 1152889023.

It is an arithmetic number, because the mean of its divisors is an integer number (17803803895020).

Almost surely, 2^{211121020222221} is an apocalyptic number.

It is an amenable number.

211121020222221 is a deficient number, since it is larger than the sum of its proper divisors (73739842098099).

211121020222221 is a wasteful number, since it uses less digits than its factorization.

211121020222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2305595276.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 211121020222221 its reverse (122222020121112), we get a palindrome (333343040343333).

The spelling of 211121020222221 in words is "two hundred eleven trillion, one hundred twenty-one billion, twenty million, two hundred twenty-two thousand, two hundred twenty-one".