1213816873050 has 36 divisors (see below), whose sum is σ = 3261121333470. Its totient is φ = 323684499360.

The previous prime is 1213816872949. The next prime is 1213816873081. The reversal of 1213816873050 is 503786183121.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1175678298369 + 38138574681 = 1084287^2 + 195291^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 1213816872987 and 1213816873005.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1348684965 + ... + 1348685864.

Almost surely, 2^{1213816873050} is an apocalyptic number.

1213816873050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213816873050 is an abundant number, since it is smaller than the sum of its proper divisors (2047304460420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213816873050 is a wasteful number, since it uses less digits than its factorization.

1213816873050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2697370847 (or 2697370839 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 1213816873050 in words is "one trillion, two hundred thirteen billion, eight hundred sixteen million, eight hundred seventy-three thousand, fifty".