101221121011 has 2 divisors, whose sum is σ = 101221121012. Its totient is φ = 101221121010.

The previous prime is 101221120909. The next prime is 101221121033. The reversal of 101221121011 is 110121122101.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 101221121011 - 2⁷ = 101221120883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101221120982 and 101221121000.

It is not a weakly prime, because it can be changed into another prime (101221128011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50610560505 + 50610560506.

It is an arithmetic number, because the mean of its divisors is an integer number (50610560506).

Almost surely, 2^101221121011 is an apocalyptic number.

101221121011 is a deficient number, since it is larger than the sum of its proper divisors (1).

101221121011 is an equidigital number, since it uses as much as digits as its factorization.

101221121011 is an odious number, because the sum of its binary digits is odd.

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

Adding to 101221121011 its reverse (110121122101), we get a palindrome (211342243112).

The spelling of 101221121011 in words is "one hundred one billion, two hundred twenty-one million, one hundred twenty-one thousand, eleven".