1211001022103 has 4 divisors (see below), whose sum is σ = 1219840445760. Its totient is φ = 1202161598448.

The previous prime is 1211001022067. The next prime is 1211001022109. The reversal of 1211001022103 is 3012201001121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1211001022103 - 2⁶ = 1211001022039 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 (1211001022109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4419711623 + ... + 4419711896.

It is an arithmetic number, because the mean of its divisors is an integer number (304960111440).

Almost surely, 2^{1211001022103} is an apocalyptic number.

1211001022103 is a deficient number, since it is larger than the sum of its proper divisors (8839423657).

1211001022103 is an equidigital number, since it uses as much as digits as its factorization.

1211001022103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8839423656.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 1211001022103 its reverse (3012201001121), we get a palindrome (4223202023224).

The spelling of 1211001022103 in words is "one trillion, two hundred eleven billion, one million, twenty-two thousand, one hundred three".