1011221010111 has 32 divisors (see below), whose sum is σ = 1491028118272. Its totient is φ = 605669944320.

The previous prime is 1011221010103. The next prime is 1011221010181. The reversal of 1011221010111 is 1110101221101.

It is not a de Polignac number, because 1011221010111 - 2³ = 1011221010103 is a prime.

It is a super-2 number, since 2×1011221010111² (a number of 25 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 (1011221010101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 590770 + ... + 1539951.

It is an arithmetic number, because the mean of its divisors is an integer number (46594628696).

Almost surely, 2^{1011221010111} is an apocalyptic number.

1011221010111 is a deficient number, since it is larger than the sum of its proper divisors (479807108161).

1011221010111 is a wasteful number, since it uses less digits than its factorization.

1011221010111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2131063.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 1011221010111 its reverse (1110101221101), we get a palindrome (2121322231212).

The spelling of 1011221010111 in words is "one trillion, eleven billion, two hundred twenty-one million, ten thousand, one hundred eleven".