103551366421 has 4 divisors (see below), whose sum is σ = 103552949344. Its totient is φ = 103549783500.

The previous prime is 103551366409. The next prime is 103551366463. The reversal of 103551366421 is 124663155301.

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, and also an emirpimes, since its reverse is a distinct semiprime: 124663155301 = 23 ⋅5420137187.

It is a cyclic number.

It is not a de Polignac number, because 103551366421 - 2⁵ = 103551366389 is a prime.

It is a super-3 number, since 3×103551366421³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103551366221) 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, 688905 + ... + 825646.

It is an arithmetic number, because the mean of its divisors is an integer number (25888237336).

Almost surely, 2^103551366421 is an apocalyptic number.

It is an amenable number.

103551366421 is a deficient number, since it is larger than the sum of its proper divisors (1582923).

103551366421 is an equidigital number, since it uses as much as digits as its factorization.

103551366421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582922.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 103551366421 in words is "one hundred three billion, five hundred fifty-one million, three hundred sixty-six thousand, four hundred twenty-one".