1213133012021 has 16 divisors (see below), whose sum is σ = 1488668855040. Its totient is φ = 964877948160.

The previous prime is 1213133012017. The next prime is 1213133012029. The reversal of 1213133012021 is 1202103313121.

It is a happy number.

It is not a de Polignac number, because 1213133012021 - 2² = 1213133012017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1213133011984 and 1213133012002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213133012029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71783066 + ... + 71799963.

It is an arithmetic number, because the mean of its divisors is an integer number (93041803440).

Almost surely, 2^{1213133012021} is an apocalyptic number.

It is an amenable number.

1213133012021 is a deficient number, since it is larger than the sum of its proper divisors (275535843019).

1213133012021 is a wasteful number, since it uses less digits than its factorization.

1213133012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143583124.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1213133012021 its reverse (1202103313121), we get a palindrome (2415236325142).

The spelling of 1213133012021 in words is "one trillion, two hundred thirteen billion, one hundred thirty-three million, twelve thousand, twenty-one".