1221211112203 has 8 divisors (see below), whose sum is σ = 1294134569280. Its totient is φ = 1150341837120.

The previous prime is 1221211112201. The next prime is 1221211112249. The reversal of 1221211112203 is 3022111121221.

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 1221211112203 - 2¹ = 1221211112201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221211112201) 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, 513544275 + ... + 513546652.

It is an arithmetic number, because the mean of its divisors is an integer number (161766821160).

Almost surely, 2^{1221211112203} is an apocalyptic number.

1221211112203 is a deficient number, since it is larger than the sum of its proper divisors (72923457077).

1221211112203 is a wasteful number, since it uses less digits than its factorization.

1221211112203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027090997.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1221211112203 its reverse (3022111121221), we get a palindrome (4243322233424).

The spelling of 1221211112203 in words is "one trillion, two hundred twenty-one billion, two hundred eleven million, one hundred twelve thousand, two hundred three".