1012011002021 has 2 divisors, whose sum is σ = 1012011002022. Its totient is φ = 1012011002020.

The previous prime is 1012011002017. The next prime is 1012011002053. The reversal of 1012011002021 is 1202001102101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 793257422500 + 218753579521 = 890650^2 + 467711^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012011002021 - 2² = 1012011002017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1012011001993 and 1012011002011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012011001021) by changing a digit.

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, 506005501010 + 506005501011.

It is an arithmetic number, because the mean of its divisors is an integer number (506005501011).

Almost surely, 2^{1012011002021} is an apocalyptic number.

It is an amenable number.

1012011002021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012011002021 is an equidigital number, since it uses as much as digits as its factorization.

1012011002021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 1012011002021 its reverse (1202001102101), we get a palindrome (2214012104122).

The spelling of 1012011002021 in words is "one trillion, twelve billion, eleven million, two thousand, twenty-one".