10211212011221 has 8 divisors (see below), whose sum is σ = 10998189986784. Its totient is φ = 9424448339760.

The previous prime is 10211212011163. The next prime is 10211212011229. The reversal of 10211212011221 is 12211021211201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10211212011221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10211212011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10211212011229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53477051 + ... + 53667656.

It is an arithmetic number, because the mean of its divisors is an integer number (1374773748348).

Almost surely, 2^{10211212011221} is an apocalyptic number.

It is an amenable number.

10211212011221 is a deficient number, since it is larger than the sum of its proper divisors (786977975563).

10211212011221 is a wasteful number, since it uses less digits than its factorization.

10211212011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107152051.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 10211212011221 its reverse (12211021211201), we get a palindrome (22422233222422).

The spelling of 10211212011221 in words is "ten trillion, two hundred eleven billion, two hundred twelve million, eleven thousand, two hundred twenty-one".