1020221120146 has 4 divisors (see below), whose sum is σ = 1530331680222. Its totient is φ = 510110560072.

The previous prime is 1020221120077. The next prime is 1020221120147. The reversal of 1020221120146 is 6410211220201.

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

It can be written as a sum of positive squares in only one way, i.e., 984966927025 + 35254193121 = 992455^2 + 187761^2 .

It is a super-2 number, since 2×1020221120146² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1020221120147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255055280035 + ... + 255055280038.

Almost surely, 2^{1020221120146} is an apocalyptic number.

1020221120146 is a deficient number, since it is larger than the sum of its proper divisors (510110560076).

1020221120146 is an equidigital number, since it uses as much as digits as its factorization.

1020221120146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510110560075.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 1020221120146 its reverse (6410211220201), we get a palindrome (7430432340347).

The spelling of 1020221120146 in words is "one trillion, twenty billion, two hundred twenty-one million, one hundred twenty thousand, one hundred forty-six".