101311221 has 8 divisors (see below), whose sum is σ = 147361824. Its totient is φ = 61400720.

The previous prime is 101311219. The next prime is 101311237. The reversal of 101311221 is 122113101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 101311221 - 2¹ = 101311219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101311197 and 101311206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101311271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1534986 + ... + 1535051.

It is an arithmetic number, because the mean of its divisors is an integer number (18420228).

Almost surely, 2^101311221 is an apocalyptic number.

101311221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

101311221 is a deficient number, since it is larger than the sum of its proper divisors (46050603).

101311221 is a wasteful number, since it uses less digits than its factorization.

101311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3070051.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 101311221 is about 10065.3475349836. The cubic root of 101311221 is about 466.1787966603.

Adding to 101311221 its reverse (122113101), we get a palindrome (223424322).

The spelling of 101311221 in words is "one hundred one million, three hundred eleven thousand, two hundred twenty-one".