1020212001997 has 2 divisors, whose sum is σ = 1020212001998. Its totient is φ = 1020212001996.

The previous prime is 1020212001983. The next prime is 1020212002039. The reversal of 1020212001997 is 7991002120201.

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., 980072280196 + 40139721801 = 989986^2 + 200349^2 .

It is an emirp because it is prime and its reverse (7991002120201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1020212001997 - 2²⁷ = 1020077784269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020212001097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510106000998 + 510106000999.

It is an arithmetic number, because the mean of its divisors is an integer number (510106000999).

Almost surely, 2^{1020212001997} is an apocalyptic number.

It is an amenable number.

1020212001997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020212001997 is an equidigital number, since it uses as much as digits as its factorization.

1020212001997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 34.

The spelling of 1020212001997 in words is "one trillion, twenty billion, two hundred twelve million, one thousand, nine hundred ninety-seven".