101211022021 has 4 divisors (see below), whose sum is σ = 101213562592. Its totient is φ = 101208481452.

The previous prime is 101211021997. The next prime is 101211022039. The reversal of 101211022021 is 120220112101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 101211022021 - 2⁷ = 101211021893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101211021992 and 101211022010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101211022051) 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, 1209561 + ... + 1290526.

It is an arithmetic number, because the mean of its divisors is an integer number (25303390648).

Almost surely, 2^101211022021 is an apocalyptic number.

It is an amenable number.

101211022021 is a deficient number, since it is larger than the sum of its proper divisors (2540571).

101211022021 is an equidigital number, since it uses as much as digits as its factorization.

101211022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2540570.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 101211022021 its reverse (120220112101), we get a palindrome (221431134122).

The spelling of 101211022021 in words is "one hundred one billion, two hundred eleven million, twenty-two thousand, twenty-one".