10101122011221 has 4 divisors (see below), whose sum is σ = 13468162681632. Its totient is φ = 6734081340812.

The previous prime is 10101122011193. The next prime is 10101122011261. The reversal of 10101122011221 is 12211022110101.

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 10101122011221 - 2⁷ = 10101122011093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10101122011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10101122011261) 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, 1683520335201 + ... + 1683520335206.

It is an arithmetic number, because the mean of its divisors is an integer number (3367040670408).

Almost surely, 2^{10101122011221} is an apocalyptic number.

It is an amenable number.

10101122011221 is a deficient number, since it is larger than the sum of its proper divisors (3367040670411).

10101122011221 is an equidigital number, since it uses as much as digits as its factorization.

10101122011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3367040670410.

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

Adding to 10101122011221 its reverse (12211022110101), we get a palindrome (22312144121322).

The spelling of 10101122011221 in words is "ten trillion, one hundred one billion, one hundred twenty-two million, eleven thousand, two hundred twenty-one".