10101112001221 has 16 divisors (see below), whose sum is σ = 10277458813440. Its totient is φ = 9925823099520.

The previous prime is 10101112001209. The next prime is 10101112001293. The reversal of 10101112001221 is 12210021110101.

It is a happy number.

10101112001221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 10101112001221 - 2²¹ = 10101109904069 is a prime.

It is a super-2 number, since 2×10101112001221² (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 (10101112041221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46500900 + ... + 46717618.

It is an arithmetic number, because the mean of its divisors is an integer number (642341175840).

Almost surely, 2^{10101112001221} is an apocalyptic number.

It is an amenable number.

10101112001221 is a deficient number, since it is larger than the sum of its proper divisors (176346812219).

10101112001221 is a wasteful number, since it uses less digits than its factorization.

10101112001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219156.

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

Adding to 10101112001221 its reverse (12210021110101), we get a palindrome (22311133111322).

The spelling of 10101112001221 in words is "ten trillion, one hundred one billion, one hundred twelve million, one thousand, two hundred twenty-one".