101011221211 has 4 divisors (see below), whose sum is σ = 104494366800. Its totient is φ = 97528075624.

The previous prime is 101011221167. The next prime is 101011221281. The reversal of 101011221211 is 112122110101.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 101011221211 - 2¹³ = 101011213019 is a prime.

It is a super-3 number, since 3×101011221211³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101011221191 and 101011221200.

It is not an unprimeable number, because it can be changed into a prime (101011221281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1741572751 + ... + 1741572808.

It is an arithmetic number, because the mean of its divisors is an integer number (26123591700).

Almost surely, 2^101011221211 is an apocalyptic number.

101011221211 is a deficient number, since it is larger than the sum of its proper divisors (3483145589).

101011221211 is an equidigital number, since it uses as much as digits as its factorization.

101011221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3483145588.

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

Adding to 101011221211 its reverse (112122110101), we get a palindrome (213133331312).

The spelling of 101011221211 in words is "one hundred one billion, eleven million, two hundred twenty-one thousand, two hundred eleven".