1021220221102 has 4 divisors (see below), whose sum is σ = 1531830331656. Its totient is φ = 510610110550.

The previous prime is 1021220221061. The next prime is 1021220221103. The reversal of 1021220221102 is 2011220221201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×1021220221102³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021220221103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255305055274 + ... + 255305055277.

It is an arithmetic number, because the mean of its divisors is an integer number (382957582914).

Almost surely, 2^{1021220221102} is an apocalyptic number.

1021220221102 is a deficient number, since it is larger than the sum of its proper divisors (510610110554).

1021220221102 is an equidigital number, since it uses as much as digits as its factorization.

1021220221102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510610110553.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1021220221102 its reverse (2011220221201), we get a palindrome (3032440442303).

Subtracting 1021220221102 from its reverse (2011220221201), we obtain a palindrome (990000000099).

The spelling of 1021220221102 in words is "one trillion, twenty-one billion, two hundred twenty million, two hundred twenty-one thousand, one hundred two".