1201011021209 has 4 divisors (see below), whose sum is σ = 1201022391504. Its totient is φ = 1200999650916.

The previous prime is 1201011021191. The next prime is 1201011021229. The reversal of 1201011021209 is 9021201101021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201011021209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201011021229) 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, 5525207 + ... + 5738460.

It is an arithmetic number, because the mean of its divisors is an integer number (300255597876).

Almost surely, 2^{1201011021209} is an apocalyptic number.

It is an amenable number.

1201011021209 is a deficient number, since it is larger than the sum of its proper divisors (11370295).

1201011021209 is a wasteful number, since it uses less digits than its factorization.

1201011021209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11370294.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 1201011021209 in words is "one trillion, two hundred one billion, eleven million, twenty-one thousand, two hundred nine".