103020020021 has 4 divisors (see below), whose sum is σ = 103183285344. Its totient is φ = 102856754700.

The previous prime is 103020020003. The next prime is 103020020029. The reversal of 103020020021 is 120020020301.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 103020020021 - 2⁶ = 103020019957 is a prime.

It is a super-2 number, since 2×103020020021² (a number of 23 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 = 103020019984 and 103020020011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103020020029) 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, 81631715 + ... + 81632976.

It is an arithmetic number, because the mean of its divisors is an integer number (25795821336).

Almost surely, 2^103020020021 is an apocalyptic number.

It is an amenable number.

103020020021 is a deficient number, since it is larger than the sum of its proper divisors (163265323).

103020020021 is an equidigital number, since it uses as much as digits as its factorization.

103020020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163265322.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 103020020021 its reverse (120020020301), we get a palindrome (223040040322).

The spelling of 103020020021 in words is "one hundred three billion, twenty million, twenty thousand, twenty-one".