1020012202021 has 2 divisors, whose sum is σ = 1020012202022. Its totient is φ = 1020012202020.

The previous prime is 1020012202009. The next prime is 1020012202067. The reversal of 1020012202021 is 1202022100201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1016640657796 + 3371544225 = 1008286^2 + 58065^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020012202021 - 2⁷ = 1020012201893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020012201992 and 1020012202010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020012202921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510006101010 + 510006101011.

It is an arithmetic number, because the mean of its divisors is an integer number (510006101011).

Almost surely, 2^{1020012202021} is an apocalyptic number.

It is an amenable number.

1020012202021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020012202021 is an equidigital number, since it uses as much as digits as its factorization.

1020012202021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1020012202021 its reverse (1202022100201), we get a palindrome (2222034302222).

The spelling of 1020012202021 in words is "one trillion, twenty billion, twelve million, two hundred two thousand, twenty-one".