1201212813 has 8 divisors (see below), whose sum is σ = 1685912800. Its totient is φ = 758660688.

The previous prime is 1201212811. The next prime is 1201212827. The reversal of 1201212813 is 3182121021.

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

It is not a de Polignac number, because 1201212813 - 2¹ = 1201212811 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1201212813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201212811) 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, 10536898 + ... + 10537011.

It is an arithmetic number, because the mean of its divisors is an integer number (210739100).

Almost surely, 2^1201212813 is an apocalyptic number.

It is an amenable number.

1201212813 is a deficient number, since it is larger than the sum of its proper divisors (484699987).

1201212813 is a wasteful number, since it uses less digits than its factorization.

1201212813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21073931.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 1201212813 is about 34658.5171783214. The cubic root of 1201212813 is about 1063.0164503442.

Adding to 1201212813 its reverse (3182121021), we get a palindrome (4383333834).

It can be divided in two parts, 1201212 and 813, that added together give a triangular number (1202025 = T₁₅₅₀).

The spelling of 1201212813 in words is "one billion, two hundred one million, two hundred twelve thousand, eight hundred thirteen".