103201778421 has 12 divisors (see below), whose sum is σ = 170364840672. Its totient is φ = 58972444776.

The previous prime is 103201778387. The next prime is 103201778441. The reversal of 103201778421 is 124877102301.

It is not a de Polignac number, because 103201778421 - 2⁶ = 103201778357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103201778441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 819061671 + ... + 819061796.

It is an arithmetic number, because the mean of its divisors is an integer number (14197070056).

Almost surely, 2^103201778421 is an apocalyptic number.

It is an amenable number.

103201778421 is a deficient number, since it is larger than the sum of its proper divisors (67163062251).

103201778421 is a wasteful number, since it uses less digits than its factorization.

103201778421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1638123480 (or 1638123477 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The spelling of 103201778421 in words is "one hundred three billion, two hundred one million, seven hundred seventy-eight thousand, four hundred twenty-one".