1012211111021 has 8 divisors (see below), whose sum is σ = 1115614121664. Its totient is φ = 910705403520.

The previous prime is 1012211111011. The next prime is 1012211111047. The reversal of 1012211111021 is 1201111122101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1012211111021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1012211110987 and 1012211111005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012211111011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 474324665 + ... + 474326798.

It is an arithmetic number, because the mean of its divisors is an integer number (139451765208).

Almost surely, 2^{1012211111021} is an apocalyptic number.

1012211111021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1012211111021 is a deficient number, since it is larger than the sum of its proper divisors (103403010643).

1012211111021 is an equidigital number, since it uses as much as digits as its factorization.

1012211111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948651571.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1012211111021 its reverse (1201111122101), we get a palindrome (2213322233122).

It can be divided in two parts, 101 and 2211111021, that added together give a palindrome (2211111122).

The spelling of 1012211111021 in words is "one trillion, twelve billion, two hundred eleven million, one hundred eleven thousand, twenty-one".