101012221221 has 16 divisors (see below), whose sum is σ = 138431385600. Its totient is φ = 65470120128.

The previous prime is 101012221217. The next prime is 101012221237. The reversal of 101012221221 is 122122210101.

It is not a de Polignac number, because 101012221221 - 2² = 101012221217 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 101012221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101012221291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213786 + ... + 497723.

It is an arithmetic number, because the mean of its divisors is an integer number (8651961600).

Almost surely, 2^101012221221 is an apocalyptic number.

It is an amenable number.

101012221221 is a deficient number, since it is larger than the sum of its proper divisors (37419164379).

101012221221 is a wasteful number, since it uses less digits than its factorization.

101012221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712828.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 101012221221 its reverse (122122210101), we get a palindrome (223134431322).

It can be divided in two parts, 10101 and 2221221, that added together give a palindrome (2231322).

The spelling of 101012221221 in words is "one hundred one billion, twelve million, two hundred twenty-one thousand, two hundred twenty-one".