101000121211221 has 4 divisors (see below), whose sum is σ = 134666828281632. Its totient is φ = 67333414140812.

The previous prime is 101000121211147. The next prime is 101000121211229. The reversal of 101000121211221 is 122112121000101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 101000121211221 - 2¹⁴ = 101000121194837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101000121211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101000121211229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16833353535201 + ... + 16833353535206.

It is an arithmetic number, because the mean of its divisors is an integer number (33666707070408).

Almost surely, 2^{101000121211221} is an apocalyptic number.

It is an amenable number.

101000121211221 is a deficient number, since it is larger than the sum of its proper divisors (33666707070411).

101000121211221 is an equidigital number, since it uses as much as digits as its factorization.

101000121211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33666707070410.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 101000121211221 its reverse (122112121000101), we get a palindrome (223112242211322).

The spelling of 101000121211221 in words is "one hundred one trillion, one hundred twenty-one million, two hundred eleven thousand, two hundred twenty-one".