1221230200123 has 8 divisors (see below), whose sum is σ = 1226955178800. Its totient is φ = 1215509355648.

The previous prime is 1221230200117. The next prime is 1221230200153. The reversal of 1221230200123 is 3210020321221.

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 1221230200123 - 2⁹ = 1221230199611 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 1221230200123.

It is not an unprimeable number, because it can be changed into a prime (1221230200153) 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, 440578 + ... + 1623751.

It is an arithmetic number, because the mean of its divisors is an integer number (153369397350).

Almost surely, 2^{1221230200123} is an apocalyptic number.

1221230200123 is a deficient number, since it is larger than the sum of its proper divisors (5724978677).

1221230200123 is a wasteful number, since it uses less digits than its factorization.

1221230200123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2067101.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 1221230200123 its reverse (3210020321221), we get a palindrome (4431250521344).

The spelling of 1221230200123 in words is "one trillion, two hundred twenty-one billion, two hundred thirty million, two hundred thousand, one hundred twenty-three".