1011112212021 has 16 divisors (see below), whose sum is σ = 1371044843520. Its totient is φ = 662627948400.

The previous prime is 1011112212017. The next prime is 1011112212043. The reversal of 1011112212021 is 1202122111101.

It is a happy number.

It is not a de Polignac number, because 1011112212021 - 2² = 1011112212017 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011112212001) 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, 6642066 + ... + 6792588.

It is an arithmetic number, because the mean of its divisors is an integer number (85690302720).

Almost surely, 2^{1011112212021} is an apocalyptic number.

It is an amenable number.

1011112212021 is a deficient number, since it is larger than the sum of its proper divisors (359932631499).

1011112212021 is a wasteful number, since it uses less digits than its factorization.

1011112212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188536.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1011112212021 its reverse (1202122111101), we get a palindrome (2213234323122).

It can be divided in two parts, 101111 and 2212021, that added together give a palindrome (2313132).

The spelling of 1011112212021 in words is "one trillion, eleven billion, one hundred twelve million, two hundred twelve thousand, twenty-one".