103121210020019 has 4 divisors (see below), whose sum is σ = 103121591035320. Its totient is φ = 103120829004720.

The previous prime is 103121210019991. The next prime is 103121210020021. The reversal of 103121210020019 is 910020012121301.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103121210020019 is a prime.

It is a super-2 number, since 2×103121210020019² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103121210019976 and 103121210020003.

It is not an unprimeable number, because it can be changed into a prime (103121210020819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190101389 + ... + 190643070.

It is an arithmetic number, because the mean of its divisors is an integer number (25780397758830).

Almost surely, 2^{103121210020019} is an apocalyptic number.

103121210020019 is a deficient number, since it is larger than the sum of its proper divisors (381015301).

103121210020019 is an equidigital number, since it uses as much as digits as its factorization.

103121210020019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381015300.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 103121210020019 in words is "one hundred three trillion, one hundred twenty-one billion, two hundred ten million, twenty thousand, nineteen".