210120100999969 has 2 divisors, whose sum is σ = 210120100999970. Its totient is φ = 210120100999968.

The previous prime is 210120100999957. The next prime is 210120101000003. The reversal of 210120100999969 is 969999001021012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148445591630625 + 61674509369344 = 12183825^2 + 7853312^2 .

It is a cyclic number.

It is not a de Polignac number, because 210120100999969 - 2²¹ = 210120098902817 is a prime.

It is a super-2 number, since 2×210120100999969² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (210120100979969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105060050499984 + 105060050499985.

It is an arithmetic number, because the mean of its divisors is an integer number (105060050499985).

Almost surely, 2^{210120100999969} is an apocalyptic number.

It is an amenable number.

210120100999969 is a deficient number, since it is larger than the sum of its proper divisors (1).

210120100999969 is an equidigital number, since it uses as much as digits as its factorization.

210120100999969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1417176, while the sum is 58.

The spelling of 210120100999969 in words is "two hundred ten trillion, one hundred twenty billion, one hundred million, nine hundred ninety-nine thousand, nine hundred sixty-nine".