1212011100001 has 8 divisors (see below), whose sum is σ = 1318165919784. Its totient is φ = 1107702451200.

The previous prime is 1212011099989. The next prime is 1212011100007. The reversal of 1212011100001 is 1000011102121.

It can be written as a sum of positive squares in 4 ways, for example, as 359611304976 + 852399795025 = 599676^2 + 923255^2 .

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 1212011100001 - 2²⁷ = 1211876882273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212011100007) 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, 461541376 + ... + 461544001.

It is an arithmetic number, because the mean of its divisors is an integer number (164770739973).

Almost surely, 2^{1212011100001} is an apocalyptic number.

It is an amenable number.

1212011100001 is a deficient number, since it is larger than the sum of its proper divisors (106154819783).

1212011100001 is a wasteful number, since it uses less digits than its factorization.

1212011100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923085491.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1212011100001 its reverse (1000011102121), we get a palindrome (2212022202122).

The spelling of 1212011100001 in words is "one trillion, two hundred twelve billion, eleven million, one hundred thousand, one".