10121221011 has 8 divisors (see below), whose sum is σ = 14721776064. Its totient is φ = 6134073320.

The previous prime is 10121221003. The next prime is 10121221013. The reversal of 10121221011 is 11012212101.

10121221011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10121221011 - 2³ = 10121221003 is a prime.

It is a super-2 number, since 2×10121221011² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10121221013) 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 7 ways as a sum of consecutive naturals, for example, 153351801 + ... + 153351866.

It is an arithmetic number, because the mean of its divisors is an integer number (1840222008).

Almost surely, 2^10121221011 is an apocalyptic number.

10121221011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

10121221011 is a deficient number, since it is larger than the sum of its proper divisors (4600555053).

10121221011 is a wasteful number, since it uses less digits than its factorization.

10121221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306703681.

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

Adding to 10121221011 its reverse (11012212101), we get a palindrome (21133433112).

It can be divided in two parts, 10121 and 221011, that added together give a palindrome (231132).

The spelling of 10121221011 in words is "ten billion, one hundred twenty-one million, two hundred twenty-one thousand, eleven".