103121211001 has 2 divisors, whose sum is σ = 103121211002. Its totient is φ = 103121211000.

The previous prime is 103121210981. The next prime is 103121211023. The reversal of 103121211001 is 100112121301.

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., 53211416976 + 49909794025 = 230676^2 + 223405^2 .

It is an emirp because it is prime and its reverse (100112121301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 103121211001 - 2²⁵ = 103087656569 is a prime.

It is not a weakly prime, because it can be changed into another prime (103121211071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51560605500 + 51560605501.

It is an arithmetic number, because the mean of its divisors is an integer number (51560605501).

Almost surely, 2^103121211001 is an apocalyptic number.

It is an amenable number.

103121211001 is a deficient number, since it is larger than the sum of its proper divisors (1).

103121211001 is an equidigital number, since it uses as much as digits as its factorization.

103121211001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 103121211001 its reverse (100112121301), we get a palindrome (203233332302).

The spelling of 103121211001 in words is "one hundred three billion, one hundred twenty-one million, two hundred eleven thousand, one".