10101012011221 has 4 divisors (see below), whose sum is σ = 10101021436000. Its totient is φ = 10101002586444.

The previous prime is 10101012011183. The next prime is 10101012011231. The reversal of 10101012011221 is 12211021010101.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 10101012011221 - 2⁷ = 10101012011093 is a prime.

It is a super-2 number, since 2×10101012011221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10101012011231) 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, 2862771 + ... + 5328928.

It is an arithmetic number, because the mean of its divisors is an integer number (2525255359000).

Almost surely, 2^{10101012011221} is an apocalyptic number.

It is an amenable number.

10101012011221 is a deficient number, since it is larger than the sum of its proper divisors (9424779).

10101012011221 is an equidigital number, since it uses as much as digits as its factorization.

10101012011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9424778.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 10101012011221 its reverse (12211021010101), we get a palindrome (22312033021322).

The spelling of 10101012011221 in words is "ten trillion, one hundred one billion, twelve million, eleven thousand, two hundred twenty-one".