1021222221201 has 96 divisors (see below), whose sum is σ = 1883040676608. Its totient is φ = 518917363200.

The previous prime is 1021222221193. The next prime is 1021222221247.

It is a happy number.

1021222221201 is a `hidden beast` number, since 1 + 0 + 21 + 222 + 221 + 201 = 666.

1021222221201 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1021222221201 - 2³ = 1021222221193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021222226201) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2893770 + ... + 3227436.

It is an arithmetic number, because the mean of its divisors is an integer number (19615007048).

Almost surely, 2^{1021222221201} is an apocalyptic number.

It is an amenable number.

1021222221201 is a deficient number, since it is larger than the sum of its proper divisors (861818455407).

1021222221201 is a wasteful number, since it uses less digits than its factorization.

1021222221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333831 (or 333828 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

It can be divided in two parts, 1021 and 222221201, that added together give a palindrome (222222222).

The spelling of 1021222221201 in words is "one trillion, twenty-one billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred one".