2111211019969 has 2 divisors, whose sum is σ = 2111211019970. Its totient is φ = 2111211019968.

The previous prime is 2111211019871. The next prime is 2111211019979. The reversal of 2111211019969 is 9699101121112.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2097897321744 + 13313698225 = 1448412^2 + 115385^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111211019969 - 2⁹ = 2111211019457 is a prime.

It is a super-2 number, since 2×2111211019969² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2111211019979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055605509984 + 1055605509985.

It is an arithmetic number, because the mean of its divisors is an integer number (1055605509985).

Almost surely, 2^{2111211019969} is an apocalyptic number.

It is an amenable number.

2111211019969 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111211019969 is an equidigital number, since it uses as much as digits as its factorization.

2111211019969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 43.

The spelling of 2111211019969 in words is "two trillion, one hundred eleven billion, two hundred eleven million, nineteen thousand, nine hundred sixty-nine".