1223121101012 has 12 divisors (see below), whose sum is σ = 2140548412800. Its totient is φ = 611535840216.

The previous prime is 1223121100951. The next prime is 1223121101023. The reversal of 1223121101012 is 2101011213221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6065978 + ... + 6264369.

It is an arithmetic number, because the mean of its divisors is an integer number (178379034400).

Almost surely, 2^{1223121101012} is an apocalyptic number.

It is an amenable number.

1223121101012 is a deficient number, since it is larger than the sum of its proper divisors (917427311788).

1223121101012 is a wasteful number, since it uses less digits than its factorization.

1223121101012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12355150 (or 12355148 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1223121101012 its reverse (2101011213221), we get a palindrome (3324132314233).

The spelling of 1223121101012 in words is "one trillion, two hundred twenty-three billion, one hundred twenty-one million, one hundred one thousand, twelve".