10121000221221 has 4 divisors (see below), whose sum is σ = 13494666961632. Its totient is φ = 6747333480812.

The previous prime is 10121000221219. The next prime is 10121000221303. The reversal of 10121000221221 is 12212200012101.

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 10121000221221 - 2¹ = 10121000221219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10121000221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121000261221) 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, 1686833370201 + ... + 1686833370206.

It is an arithmetic number, because the mean of its divisors is an integer number (3373666740408).

Almost surely, 2^{10121000221221} is an apocalyptic number.

It is an amenable number.

10121000221221 is a deficient number, since it is larger than the sum of its proper divisors (3373666740411).

10121000221221 is an equidigital number, since it uses as much as digits as its factorization.

10121000221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3373666740410.

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

Adding to 10121000221221 its reverse (12212200012101), we get a palindrome (22333200233322).

The spelling of 10121000221221 in words is "ten trillion, one hundred twenty-one billion, two hundred twenty-one thousand, two hundred twenty-one".