210122222112121 has 4 divisors (see below), whose sum is σ = 229224242304144. Its totient is φ = 191020201920100.

The previous prime is 210122222112083. The next prime is 210122222112161. The reversal of 210122222112121 is 121211222221012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 210122222112121 - 2¹⁹ = 210122221587833 is a prime.

It is a super-2 number, since 2×210122222112121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210122222112092 and 210122222112101.

It is not an unprimeable number, because it can be changed into a prime (210122222112161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9551010095995 + ... + 9551010096016.

It is an arithmetic number, because the mean of its divisors is an integer number (57306060576036).

Almost surely, 2^{210122222112121} is an apocalyptic number.

It is an amenable number.

210122222112121 is a deficient number, since it is larger than the sum of its proper divisors (19102020192023).

210122222112121 is a wasteful number, since it uses less digits than its factorization.

210122222112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19102020192022.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 210122222112121 its reverse (121211222221012), we get a palindrome (331333444333133).

The spelling of 210122222112121 in words is "two hundred ten trillion, one hundred twenty-two billion, two hundred twenty-two million, one hundred twelve thousand, one hundred twenty-one".