1010111011221 has 64 divisors (see below), whose sum is σ = 1517031161856. Its totient is φ = 593865888000.

The previous prime is 1010111011211. The next prime is 1010111011241. The reversal of 1010111011221 is 1221101110101.

It is not a de Polignac number, because 1010111011221 - 2⁷ = 1010111011093 is a prime.

It is a super-2 number, since 2×1010111011221² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1010111011197 and 1010111011206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010111011211) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13106020 + ... + 13182866.

It is an arithmetic number, because the mean of its divisors is an integer number (23703611904).

Almost surely, 2^{1010111011221} is an apocalyptic number.

It is an amenable number.

1010111011221 is a deficient number, since it is larger than the sum of its proper divisors (506920150635).

1010111011221 is a wasteful number, since it uses less digits than its factorization.

1010111011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77082.

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

Adding to 1010111011221 its reverse (1221101110101), we get a palindrome (2231212121322).

The spelling of 1010111011221 in words is "one trillion, ten billion, one hundred eleven million, eleven thousand, two hundred twenty-one".