210121000112221 has 8 divisors (see below), whose sum is σ = 229242613892544. Its totient is φ = 191002670445120.

The previous prime is 210121000112161. The next prime is 210121000112239. The reversal of 210121000112221 is 122211000121012.

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 210121000112221 - 2³³ = 210112410177629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210121000112195 and 210121000112204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210121000112251) 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, 820894521 + ... + 821150446.

It is an arithmetic number, because the mean of its divisors is an integer number (28655326736568).

Almost surely, 2^{210121000112221} is an apocalyptic number.

It is an amenable number.

210121000112221 is a deficient number, since it is larger than the sum of its proper divisors (19121613780323).

210121000112221 is a wasteful number, since it uses less digits than its factorization.

210121000112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642056611.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 210121000112221 its reverse (122211000121012), we get a palindrome (332332000233233).

The spelling of 210121000112221 in words is "two hundred ten trillion, one hundred twenty-one billion, one hundred twelve thousand, two hundred twenty-one".