1210699821138 has 16 divisors (see below), whose sum is σ = 2421428795136. Its totient is φ = 403561748240.

The previous prime is 1210699821137. The next prime is 1210699821151. The reversal of 1210699821138 is 8311289960121.

It is not an unprimeable number, because it can be changed into a prime (1210699821131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 654981 + ... + 1688312.

It is an arithmetic number, because the mean of its divisors is an integer number (151339299696).

Almost surely, 2^{1210699821138} is an apocalyptic number.

1210699821138 is an abundant number, since it is smaller than the sum of its proper divisors (1210728973998).

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

1210699821138 is a wasteful number, since it uses less digits than its factorization.

1210699821138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2429409.

The product of its (nonzero) digits is 373248, while the sum is 51.

The spelling of 1210699821138 in words is "one trillion, two hundred ten billion, six hundred ninety-nine million, eight hundred twenty-one thousand, one hundred thirty-eight".