1212211112001 has 8 divisors (see below), whose sum is σ = 1617318231360. Its totient is φ = 807622366992.

The previous prime is 1212211111973. The next prime is 1212211112053. The reversal of 1212211112001 is 1002111122121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1212211112001 - 2²³ = 1212202723393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212211112071) 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, 129588130 + ... + 129597483.

It is an arithmetic number, because the mean of its divisors is an integer number (202164778920).

Almost surely, 2^{1212211112001} is an apocalyptic number.

It is an amenable number.

1212211112001 is a deficient number, since it is larger than the sum of its proper divisors (405107119359).

1212211112001 is a wasteful number, since it uses less digits than its factorization.

1212211112001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259187175.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1212211112001 its reverse (1002111122121), we get a palindrome (2214322234122).

The spelling of 1212211112001 in words is "one trillion, two hundred twelve billion, two hundred eleven million, one hundred twelve thousand, one".