221121011212113 has 8 divisors (see below), whose sum is σ = 295097756962048. Its totient is φ = 147279136468464.

The previous prime is 221121011212109. The next prime is 221121011212117. The reversal of 221121011212113 is 311212110121122.

It is an interprime number because it is at equal distance from previous prime (221121011212109) and next prime (221121011212117).

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

It is not a de Polignac number, because 221121011212113 - 2² = 221121011212109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221121011212113.

It is not an unprimeable number, because it can be changed into a prime (221121011212117) 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, 33717747745 + ... + 33717754302.

It is an arithmetic number, because the mean of its divisors is an integer number (36887219620256).

Almost surely, 2^{221121011212113} is an apocalyptic number.

It is an amenable number.

221121011212113 is a deficient number, since it is larger than the sum of its proper divisors (73976745749935).

221121011212113 is a wasteful number, since it uses less digits than its factorization.

221121011212113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67435503143.

The product of its (nonzero) digits is 96, while the sum is 21.

Adding to 221121011212113 its reverse (311212110121122), we get a palindrome (532333121333235).

The spelling of 221121011212113 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, eleven million, two hundred twelve thousand, one hundred thirteen".