1021211101111 has 16 divisors (see below), whose sum is σ = 1081761408000. Its totient is φ = 962013225888.

The previous prime is 1021211101109. The next prime is 1021211101117. The reversal of 1021211101111 is 1111011121201.

It is a cyclic number.

It is not a de Polignac number, because 1021211101111 - 2¹ = 1021211101109 is a prime.

It is a super-2 number, since 2×1021211101111² (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 = 1021211101091 and 1021211101100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021211101117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6937170 + ... + 7082848.

It is an arithmetic number, because the mean of its divisors is an integer number (67610088000).

Almost surely, 2^{1021211101111} is an apocalyptic number.

1021211101111 is a deficient number, since it is larger than the sum of its proper divisors (60550306889).

1021211101111 is a wasteful number, since it uses less digits than its factorization.

1021211101111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150318.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 1021211101111 its reverse (1111011121201), we get a palindrome (2132222222312).

The spelling of 1021211101111 in words is "one trillion, twenty-one billion, two hundred eleven million, one hundred one thousand, one hundred eleven".