1209119911901 has 8 divisors (see below), whose sum is σ = 1319050471008. Its totient is φ = 1099191114000.

The previous prime is 1209119911847. The next prime is 1209119912047. The reversal of 1209119911901 is 1091199119021.

1209119911901 is digitally balanced in base 12, because in such base it contains all the possibile digits an equal number of times.

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 1209119911901 - 2²² = 1209115717597 is a prime.

It is a super-2 number, since 2×1209119911901² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

1209119911901 is strictly pandigital in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1209119911801) 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, 1291271 + ... + 2021291.

It is an arithmetic number, because the mean of its divisors is an integer number (164881308876).

Almost surely, 2^{1209119911901} is an apocalyptic number.

1209119911901 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1209119911901 is a deficient number, since it is larger than the sum of its proper divisors (109930559107).

1209119911901 is a wasteful number, since it uses less digits than its factorization.

1209119911901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880603.

The product of its (nonzero) digits is 13122, while the sum is 44.

It can be divided in two parts, 1 and 209119911901, that added together give a palindrome (209119911902).

The spelling of 1209119911901 in words is "one trillion, two hundred nine billion, one hundred nineteen million, nine hundred eleven thousand, nine hundred one".