1021000221002 has 4 divisors (see below), whose sum is σ = 1531500331506. Its totient is φ = 510500110500.

The previous prime is 1021000220957. The next prime is 1021000221029. The reversal of 1021000221002 is 2001220001201.

It is a happy number.

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., 992890680721 + 28109540281 = 996439^2 + 167659^2 .

It is a super-2 number, since 2×1021000221002² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255250055249 + ... + 255250055252.

Almost surely, 2^{1021000221002} is an apocalyptic number.

1021000221002 is a deficient number, since it is larger than the sum of its proper divisors (510500110504).

1021000221002 is an equidigital number, since it uses as much as digits as its factorization.

1021000221002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510500110503.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1021000221002 its reverse (2001220001201), we get a palindrome (3022220222203).

The spelling of 1021000221002 in words is "one trillion, twenty-one billion, two hundred twenty-one thousand, two".