101213221221 has 40 divisors (see below), whose sum is σ = 172820222784. Its totient is φ = 57827468160.

The previous prime is 101213221139. The next prime is 101213221247. The reversal of 101213221221 is 122122312101.

101213221221 is a `hidden beast` number, since 1 + 0 + 121 + 322 + 1 + 221 = 666.

It is not a de Polignac number, because 101213221221 - 2⁹ = 101213220709 is a prime.

It is a super-2 number, since 2×101213221221² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 101213221194 and 101213221203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101213221261) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7461181 + ... + 7474733.

Almost surely, 2^101213221221 is an apocalyptic number.

It is an amenable number.

101213221221 is a deficient number, since it is larger than the sum of its proper divisors (71607001563).

101213221221 is a wasteful number, since it uses less digits than its factorization.

101213221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26743 (or 26734 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 101213221221 its reverse (122122312101), we get a palindrome (223335533322).

The spelling of 101213221221 in words is "one hundred one billion, two hundred thirteen million, two hundred twenty-one thousand, two hundred twenty-one".