1212122011001 has 12 divisors (see below), whose sum is σ = 1335114009600. Its totient is φ = 1099628570040.

The previous prime is 1212122010959. The next prime is 1212122011013. The reversal of 1212122011001 is 1001102212121.

It is not a de Polignac number, because 1212122011001 - 2¹⁰ = 1212122009977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1212122011501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10398761 + ... + 10514678.

It is an arithmetic number, because the mean of its divisors is an integer number (111259500800).

Almost surely, 2^{1212122011001} is an apocalyptic number.

1212122011001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1212122011001 is a deficient number, since it is larger than the sum of its proper divisors (122991998599).

1212122011001 is a wasteful number, since it uses less digits than its factorization.

1212122011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20913940 (or 20913929 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1212122011001 its reverse (1001102212121), we get a palindrome (2213224223122).

The spelling of 1212122011001 in words is "one trillion, two hundred twelve billion, one hundred twenty-two million, eleven thousand, one".