101211110221 has 24 divisors (see below), whose sum is σ = 110419096320. Its totient is φ = 92724929856.

The previous prime is 101211110197. The next prime is 101211110227. The reversal of 101211110221 is 122011112101.

It is a happy number.

It is not a de Polignac number, because 101211110221 - 2¹⁵ = 101211077453 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101211110227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32448300 + ... + 32451418.

It is an arithmetic number, because the mean of its divisors is an integer number (4600795680).

Almost surely, 2^101211110221 is an apocalyptic number.

It is an amenable number.

101211110221 is a deficient number, since it is larger than the sum of its proper divisors (9207986099).

101211110221 is a wasteful number, since it uses less digits than its factorization.

101211110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4525 (or 4512 counting only the distinct ones).

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

Adding to 101211110221 its reverse (122011112101), we get a palindrome (223222222322).

The spelling of 101211110221 in words is "one hundred one billion, two hundred eleven million, one hundred ten thousand, two hundred twenty-one".