1213203120154 has 8 divisors (see below), whose sum is σ = 1820210809428. Its totient is φ = 606466183680.

The previous prime is 1213203120133. The next prime is 1213203120161. The reversal of 1213203120154 is 4510213023121.

It can be written as a sum of positive squares in 2 ways, for example, as 1161594639529 + 51608480625 = 1077773^2 + 227175^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67676997 + ... + 67694920.

Almost surely, 2^{1213203120154} is an apocalyptic number.

1213203120154 is a deficient number, since it is larger than the sum of its proper divisors (607007689274).

1213203120154 is a wasteful number, since it uses less digits than its factorization.

1213203120154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135376400.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 1213203120154 its reverse (4510213023121), we get a palindrome (5723416143275).

The spelling of 1213203120154 in words is "one trillion, two hundred thirteen billion, two hundred three million, one hundred twenty thousand, one hundred fifty-four".