1012020021002 has 4 divisors (see below), whose sum is σ = 1518030031506. Its totient is φ = 506010010500.

The previous prime is 1012020020953. The next prime is 1012020021043. The reversal of 1012020021002 is 2001200202101.

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., 983010777961 + 29009243041 = 991469^2 + 170321^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253005005249 + ... + 253005005252.

Almost surely, 2^{1012020021002} is an apocalyptic number.

1012020021002 is a deficient number, since it is larger than the sum of its proper divisors (506010010504).

1012020021002 is an equidigital number, since it uses as much as digits as its factorization.

1012020021002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506010010503.

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

Adding to 1012020021002 its reverse (2001200202101), we get a palindrome (3013220223103).

The spelling of 1012020021002 in words is "one trillion, twelve billion, twenty million, twenty-one thousand, two".