101220101211 has 4 divisors (see below), whose sum is σ = 134960134952. Its totient is φ = 67480067472.

The previous prime is 101220101201. The next prime is 101220101233. The reversal of 101220101211 is 112101022101.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 101220101211 - 2¹⁷ = 101219970139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101220101201) 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 3 ways as a sum of consecutive naturals, for example, 16870016866 + ... + 16870016871.

It is an arithmetic number, because the mean of its divisors is an integer number (33740033738).

Almost surely, 2^101220101211 is an apocalyptic number.

101220101211 is a deficient number, since it is larger than the sum of its proper divisors (33740033741).

101220101211 is an equidigital number, since it uses as much as digits as its factorization.

101220101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33740033740.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 101220101211 its reverse (112101022101), we get a palindrome (213321123312).

The spelling of 101220101211 in words is "one hundred one billion, two hundred twenty million, one hundred one thousand, two hundred eleven".