10121100012221 has 4 divisors (see below), whose sum is σ = 11041200013344. Its totient is φ = 9201000011100.

The previous prime is 10121100012193. The next prime is 10121100012253. The reversal of 10121100012221 is 12221000112101.

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 10121100012221 - 2³⁰ = 10120026270397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10121100012196 and 10121100012205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121100018221) 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, 460050000545 + ... + 460050000566.

It is an arithmetic number, because the mean of its divisors is an integer number (2760300003336).

Almost surely, 2^{10121100012221} is an apocalyptic number.

10121100012221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10121100012221 is a deficient number, since it is larger than the sum of its proper divisors (920100001123).

10121100012221 is an equidigital number, since it uses as much as digits as its factorization.

10121100012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920100001122.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 10121100012221 its reverse (12221000112101), we get a palindrome (22342100124322).

The spelling of 10121100012221 in words is "ten trillion, one hundred twenty-one billion, one hundred million, twelve thousand, two hundred twenty-one".