1213451013133 has 8 divisors (see below), whose sum is σ = 1224675401976. Its totient is φ = 1202235148800.

The previous prime is 1213451013053. The next prime is 1213451013191. The reversal of 1213451013133 is 3313101543121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1520844004 + 1211930169129 = 38998^2 + 1100877^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1213451013133 - 2²¹ = 1213448915981 is a prime.

It is a super-2 number, since 2×1213451013133² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213451014133) 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, 1844938 + ... + 2414683.

It is an arithmetic number, because the mean of its divisors is an integer number (153084425247).

Almost surely, 2^{1213451013133} is an apocalyptic number.

It is an amenable number.

1213451013133 is a deficient number, since it is larger than the sum of its proper divisors (11224388843).

1213451013133 is a wasteful number, since it uses less digits than its factorization.

1213451013133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4262255.

The product of its (nonzero) digits is 3240, while the sum is 28.

Adding to 1213451013133 its reverse (3313101543121), we get a palindrome (4526552556254).

The spelling of 1213451013133 in words is "one trillion, two hundred thirteen billion, four hundred fifty-one million, thirteen thousand, one hundred thirty-three".