1012221110021 has 4 divisors (see below), whose sum is σ = 1104241210944. Its totient is φ = 920201009100.

The previous prime is 1012221109993. The next prime is 1012221110053. The reversal of 1012221110021 is 1200111222101.

1012221110021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1012221110021 - 2⁶ = 1012221109957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012221109978 and 1012221110005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012221110521) 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, 46010050445 + ... + 46010050466.

It is an arithmetic number, because the mean of its divisors is an integer number (276060302736).

Almost surely, 2^{1012221110021} is an apocalyptic number.

1012221110021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1012221110021 is a deficient number, since it is larger than the sum of its proper divisors (92020100923).

1012221110021 is an equidigital number, since it uses as much as digits as its factorization.

1012221110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92020100922.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1012221110021 its reverse (1200111222101), we get a palindrome (2212332332122).

The spelling of 1012221110021 in words is "one trillion, twelve billion, two hundred twenty-one million, one hundred ten thousand, twenty-one".