1212011019997 has 2 divisors, whose sum is σ = 1212011019998. Its totient is φ = 1212011019996.

The previous prime is 1212011019979. The next prime is 1212011020067. The reversal of 1212011019997 is 7999101102121.

Together with previous prime (1212011019979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 824344148356 + 387666871641 = 907934^2 + 622629^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212011019997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212011019917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606005509998 + 606005509999.

It is an arithmetic number, because the mean of its divisors is an integer number (606005509999).

Almost surely, 2^{1212011019997} is an apocalyptic number.

It is an amenable number.

1212011019997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212011019997 is an equidigital number, since it uses as much as digits as its factorization.

1212011019997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 43.

The spelling of 1212011019997 in words is "one trillion, two hundred twelve billion, eleven million, nineteen thousand, nine hundred ninety-seven".