10211121220999 has 12 divisors (see below), whose sum is σ = 10653576078288. Its totient is φ = 9785790990720.

The previous prime is 10211121220907. The next prime is 10211121221071. The reversal of 10211121220999 is 99902212111201.

It is not a de Polignac number, because 10211121220999 - 2¹⁷ = 10211121089927 is a prime.

It is a super-2 number, since 2×10211121220999² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10211121224999) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51481194 + ... + 51679159.

It is an arithmetic number, because the mean of its divisors is an integer number (887798006524).

Almost surely, 2^{10211121220999} is an apocalyptic number.

10211121220999 is a deficient number, since it is larger than the sum of its proper divisors (442454857289).

10211121220999 is a wasteful number, since it uses less digits than its factorization.

10211121220999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103160518 (or 103160487 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 40.

The spelling of 10211121220999 in words is "ten trillion, two hundred eleven billion, one hundred twenty-one million, two hundred twenty thousand, nine hundred ninety-nine".