1251211640230 has 16 divisors (see below), whose sum is σ = 2253941867520. Its totient is φ = 500093341632.

The previous prime is 1251211640221. The next prime is 1251211640243. The reversal of 1251211640230 is 320461121521.

It is a super-3 number, since 3×1251211640230³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48900879 + ... + 48926458.

It is an arithmetic number, because the mean of its divisors is an integer number (140871366720).

Almost surely, 2^{1251211640230} is an apocalyptic number.

1251211640230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1251211640230 is a deficient number, since it is larger than the sum of its proper divisors (1002730227290).

1251211640230 is a wasteful number, since it uses less digits than its factorization.

1251211640230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97828623.

The product of its (nonzero) digits is 2880, while the sum is 28.

Adding to 1251211640230 its reverse (320461121521), we get a palindrome (1571672761751).

The spelling of 1251211640230 in words is "one trillion, two hundred fifty-one billion, two hundred eleven million, six hundred forty thousand, two hundred thirty".