101021211 has 12 divisors (see below), whose sum is σ = 149863792. Its totient is φ = 65527056.

The previous prime is 101021177. The next prime is 101021227. The reversal of 101021211 is 112120101.

It is a happy number.

It is not a de Polignac number, because 101021211 - 2¹⁹ = 100496923 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101021193 and 101021202.

It is not an unprimeable number, because it can be changed into a prime (101021251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 151351 + ... + 152016.

Almost surely, 2^101021211 is an apocalyptic number.

101021211 is a deficient number, since it is larger than the sum of its proper divisors (48842581).

101021211 is a wasteful number, since it uses less digits than its factorization.

101021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303410 (or 303407 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 101021211 is about 10050.9308524136. The cubic root of 101021211 is about 465.7335491020.

Adding to 101021211 its reverse (112120101), we get a palindrome (213141312).

The spelling of 101021211 in words is "one hundred one million, twenty-one thousand, two hundred eleven".