1221230212013 has 8 divisors (see below), whose sum is σ = 1395716855040. Its totient is φ = 1046749865040.

The previous prime is 1221230212003. The next prime is 1221230212019. The reversal of 1221230212013 is 3102120321221.

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 1221230212013 - 2¹⁰ = 1221230210989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221230212019) 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, 1150778 + ... + 1940811.

It is an arithmetic number, because the mean of its divisors is an integer number (174464606880).

Almost surely, 2^{1221230212013} is an apocalyptic number.

It is an amenable number.

1221230212013 is a deficient number, since it is larger than the sum of its proper divisors (174486643027).

1221230212013 is an equidigital number, since it uses as much as digits as its factorization.

1221230212013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3148027.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1221230212013 its reverse (3102120321221), we get a palindrome (4323350533234).

The spelling of 1221230212013 in words is "one trillion, two hundred twenty-one billion, two hundred thirty million, two hundred twelve thousand, thirteen".