1000221022021 has 16 divisors (see below), whose sum is σ = 1093015748160. Its totient is φ = 909749957760.

The previous prime is 1000221022007. The next prime is 1000221022079. The reversal of 1000221022021 is 1202201220001.

It is a happy number.

1000221022021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 1000221022021 - 2¹⁵ = 1000220989253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000221021992 and 1000221022010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000221022421) 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, 814000 + ... + 1631881.

It is an arithmetic number, because the mean of its divisors is an integer number (68313484260).

Almost surely, 2^{1000221022021} is an apocalyptic number.

It is an amenable number.

1000221022021 is a deficient number, since it is larger than the sum of its proper divisors (92794726139).

1000221022021 is a wasteful number, since it uses less digits than its factorization.

1000221022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2446356.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1000221022021 its reverse (1202201220001), we get a palindrome (2202422242022).

The spelling of 1000221022021 in words is "one trillion, two hundred twenty-one million, twenty-two thousand, twenty-one".