210121001109983 has 2 divisors, whose sum is σ = 210121001109984. Its totient is φ = 210121001109982.

The previous prime is 210121001109973. The next prime is 210121001110019. The reversal of 210121001109983 is 389901100121012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 210121001109983 - 2⁴ = 210121001109967 is a prime.

It is a super-2 number, since 2×210121001109983² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210121001109973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105060500554991 + 105060500554992.

It is an arithmetic number, because the mean of its divisors is an integer number (105060500554992).

Almost surely, 2^{210121001109983} is an apocalyptic number.

210121001109983 is a deficient number, since it is larger than the sum of its proper divisors (1).

210121001109983 is an equidigital number, since it uses as much as digits as its factorization.

210121001109983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 38.

The spelling of 210121001109983 in words is "two hundred ten trillion, one hundred twenty-one billion, one million, one hundred nine thousand, nine hundred eighty-three".