1221303010011 has 8 divisors (see below), whose sum is σ = 1861033158144. Its totient is φ = 697887434280.

The previous prime is 1221303010009. The next prime is 1221303010063. The reversal of 1221303010011 is 1100103031221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1221303010011 - 2¹ = 1221303010009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1221303010001) 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, 29078643075 + ... + 29078643116.

It is an arithmetic number, because the mean of its divisors is an integer number (232629144768).

Almost surely, 2^{1221303010011} is an apocalyptic number.

1221303010011 is a deficient number, since it is larger than the sum of its proper divisors (639730148133).

1221303010011 is an equidigital number, since it uses as much as digits as its factorization.

1221303010011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58157286201.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 1221303010011 its reverse (1100103031221), we get a palindrome (2321406041232).

The spelling of 1221303010011 in words is "one trillion, two hundred twenty-one billion, three hundred three million, ten thousand, eleven".