1213303122121 has 32 divisors (see below), whose sum is σ = 1327568486400. Its totient is φ = 1104622323840.

The previous prime is 1213303122107. The next prime is 1213303122127. The reversal of 1213303122121 is 1212213033121.

It is a cyclic number.

It is not a de Polignac number, because 1213303122121 - 2⁹ = 1213303121609 is a prime.

It is a super-2 number, since 2×1213303122121² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1213303122092 and 1213303122101.

It is not an unprimeable number, because it can be changed into a prime (1213303122127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52001160 + ... + 52024486.

It is an arithmetic number, because the mean of its divisors is an integer number (41486515200).

Almost surely, 2^{1213303122121} is an apocalyptic number.

It is an amenable number.

1213303122121 is a deficient number, since it is larger than the sum of its proper divisors (114265364279).

1213303122121 is a wasteful number, since it uses less digits than its factorization.

1213303122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23989.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1213303122121 its reverse (1212213033121), we get a palindrome (2425516155242).

The spelling of 1213303122121 in words is "one trillion, two hundred thirteen billion, three hundred three million, one hundred twenty-two thousand, one hundred twenty-one".