1211102203123 has 8 divisors (see below), whose sum is σ = 1275736576400. Its totient is φ = 1146557045088.

The previous prime is 1211102203109. The next prime is 1211102203187. The reversal of 1211102203123 is 3213022011121.

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 1211102203123 - 2²⁹ = 1210565332211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

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 1211102203123.

It is not an unprimeable number, because it can be changed into a prime (1211102203193) 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, 22275936 + ... + 22330237.

It is an arithmetic number, because the mean of its divisors is an integer number (159467072050).

Almost surely, 2^{1211102203123} is an apocalyptic number.

1211102203123 is a deficient number, since it is larger than the sum of its proper divisors (64634373277).

1211102203123 is a wasteful number, since it uses less digits than its factorization.

1211102203123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44607621.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1211102203123 its reverse (3213022011121), we get a palindrome (4424124214244).

The spelling of 1211102203123 in words is "one trillion, two hundred eleven billion, one hundred two million, two hundred three thousand, one hundred twenty-three".