1012211110021 has 4 divisors (see below), whose sum is σ = 1044863081344. Its totient is φ = 979559138700.

The previous prime is 1012211110013. The next prime is 1012211110061. The reversal of 1012211110021 is 1200111122101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1012211110021 - 2³ = 1012211110013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012211109983 and 1012211110010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012211110061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16325985615 + ... + 16325985676.

It is an arithmetic number, because the mean of its divisors is an integer number (261215770336).

Almost surely, 2^{1012211110021} is an apocalyptic number.

It is an amenable number.

1012211110021 is a deficient number, since it is larger than the sum of its proper divisors (32651971323).

1012211110021 is an equidigital number, since it uses as much as digits as its factorization.

1012211110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32651971322.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1012211110021 its reverse (1200111122101), we get a palindrome (2212322232122).

The spelling of 1012211110021 in words is "one trillion, twelve billion, two hundred eleven million, one hundred ten thousand, twenty-one".