221210102121 has 8 divisors (see below), whose sum is σ = 307770576960. Its totient is φ = 141061514352.

The previous prime is 221210102053. The next prime is 221210102123. The reversal of 221210102121 is 121201012122.

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

It is not a de Polignac number, because 221210102121 - 2¹⁴ = 221210085737 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221210102121.

It is not an unprimeable number, because it can be changed into a prime (221210102123) 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, 1602971686 + ... + 1602971823.

It is an arithmetic number, because the mean of its divisors is an integer number (38471322120).

Almost surely, 2^221210102121 is an apocalyptic number.

It is an amenable number.

221210102121 is a deficient number, since it is larger than the sum of its proper divisors (86560474839).

221210102121 is a wasteful number, since it uses less digits than its factorization.

221210102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3205943535.

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

Adding to 221210102121 its reverse (121201012122), we get a palindrome (342411114243).

The spelling of 221210102121 in words is "two hundred twenty-one billion, two hundred ten million, one hundred two thousand, one hundred twenty-one".