1021110021002 has 4 divisors (see below), whose sum is σ = 1531665031506. Its totient is φ = 510555010500.

The previous prime is 1021110020999. The next prime is 1021110021017. The reversal of 1021110021002 is 2001200111201.

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., 1020966764041 + 143256961 = 1010429^2 + 11969^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255277505249 + ... + 255277505252.

Almost surely, 2^{1021110021002} is an apocalyptic number.

1021110021002 is a deficient number, since it is larger than the sum of its proper divisors (510555010504).

1021110021002 is an equidigital number, since it uses as much as digits as its factorization.

1021110021002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510555010503.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1021110021002 its reverse (2001200111201), we get a palindrome (3022310132203).

The spelling of 1021110021002 in words is "one trillion, twenty-one billion, one hundred ten million, twenty-one thousand, two".