1021100122111 has 8 divisors (see below), whose sum is σ = 1043114941440. Its totient is φ = 999097356408.

The previous prime is 1021100122103. The next prime is 1021100122117. The reversal of 1021100122111 is 1112210011201.

It is a happy number.

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 1021100122111 - 2³ = 1021100122103 is a prime.

It is a super-2 number, since 2×1021100122111² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021100122091 and 1021100122100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021100122117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2842051 + ... + 3181108.

It is an arithmetic number, because the mean of its divisors is an integer number (130389367680).

Almost surely, 2^{1021100122111} is an apocalyptic number.

1021100122111 is a deficient number, since it is larger than the sum of its proper divisors (22014819329).

1021100122111 is an equidigital number, since it uses as much as digits as its factorization.

1021100122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6026813.

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

Adding to 1021100122111 its reverse (1112210011201), we get a palindrome (2133310133312).

The spelling of 1021100122111 in words is "one trillion, twenty-one billion, one hundred million, one hundred twenty-two thousand, one hundred eleven".