101211121221011 has 4 divisors (see below), whose sum is σ = 101211141574872. Its totient is φ = 101211100867152.

The previous prime is 101211121220941. The next prime is 101211121221029. The reversal of 101211121221011 is 110122121112101.

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 101211121221011 - 2⁴⁶ = 30842377043347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101211121221811) 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, 2784716 + ... + 14497478.

It is an arithmetic number, because the mean of its divisors is an integer number (25302785393718).

Almost surely, 2^{101211121221011} is an apocalyptic number.

101211121221011 is a deficient number, since it is larger than the sum of its proper divisors (20353861).

101211121221011 is an equidigital number, since it uses as much as digits as its factorization.

101211121221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20353860.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 101211121221011 its reverse (110122121112101), we get a palindrome (211333242333112).

The spelling of 101211121221011 in words is "one hundred one trillion, two hundred eleven billion, one hundred twenty-one million, two hundred twenty-one thousand, eleven".