1213221400123 has 8 divisors (see below), whose sum is σ = 1216958536800. Its totient is φ = 1209486251328.

The previous prime is 1213221400117. The next prime is 1213221400141. The reversal of 1213221400123 is 3210041223121.

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 1213221400123 - 2⁵ = 1213221400091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213221400094 and 1213221400103.

It is not an unprimeable number, because it can be changed into a prime (1213221403123) 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, 730183 + ... + 1720351.

It is an arithmetic number, because the mean of its divisors is an integer number (152119817100).

Almost surely, 2^{1213221400123} is an apocalyptic number.

1213221400123 is a deficient number, since it is larger than the sum of its proper divisors (3737136677).

1213221400123 is an equidigital number, since it uses as much as digits as its factorization.

1213221400123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993941.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1213221400123 its reverse (3210041223121), we get a palindrome (4423262623244).

The spelling of 1213221400123 in words is "one trillion, two hundred thirteen billion, two hundred twenty-one million, four hundred thousand, one hundred twenty-three".