210022121121 has 4 divisors (see below), whose sum is σ = 280029494832. Its totient is φ = 140014747412.

The previous prime is 210022121069. The next prime is 210022121137. The reversal of 210022121121 is 121121220012.

210022121121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 210022121121 - 2²² = 210017926817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210022121121.

It is not an unprimeable number, because it can be changed into a prime (210022121821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35003686851 + ... + 35003686856.

It is an arithmetic number, because the mean of its divisors is an integer number (70007373708).

Almost surely, 2^210022121121 is an apocalyptic number.

It is an amenable number.

210022121121 is a deficient number, since it is larger than the sum of its proper divisors (70007373711).

210022121121 is an equidigital number, since it uses as much as digits as its factorization.

210022121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70007373710.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 210022121121 its reverse (121121220012), we get a palindrome (331143341133).

The spelling of 210022121121 in words is "two hundred ten billion, twenty-two million, one hundred twenty-one thousand, one hundred twenty-one".