210011121011221 has 8 divisors (see below), whose sum is σ = 214479875376000. Its totient is φ = 205542384673248.

The previous prime is 210011121011191. The next prime is 210011121011303. The reversal of 210011121011221 is 122110121110012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 210011121011221 - 2²³ = 210011112622613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210011121011195 and 210011121011204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210011121011621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20502025 + ... + 28988881.

It is an arithmetic number, because the mean of its divisors is an integer number (26809984422000).

Almost surely, 2^{210011121011221} is an apocalyptic number.

It is an amenable number.

210011121011221 is a deficient number, since it is larger than the sum of its proper divisors (4468754364779).

210011121011221 is an equidigital number, since it uses as much as digits as its factorization.

210011121011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9013403.

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

Adding to 210011121011221 its reverse (122110121110012), we get a palindrome (332121242121233).

The spelling of 210011121011221 in words is "two hundred ten trillion, eleven billion, one hundred twenty-one million, eleven thousand, two hundred twenty-one".