1212201000001 has 8 divisors (see below), whose sum is σ = 1232266386600. Its totient is φ = 1192141847040.

The previous prime is 1212200999987. The next prime is 1212201000029. The reversal of 1212201000001 is 1000001022121.

It is a Cunningham number, because it is equal to 1101000²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 3412896400 + 1208788103601 = 58420^2 + 1099449^2 .

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 1212201000001 - 2⁹ = 1212200999489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212201000301) 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, 1165456 + ... + 1944913.

It is an arithmetic number, because the mean of its divisors is an integer number (154033298325).

Almost surely, 2^{1212201000001} is an apocalyptic number.

It is an amenable number.

1212201000001 is a deficient number, since it is larger than the sum of its proper divisors (20065386599).

1212201000001 is an equidigital number, since it uses as much as digits as its factorization.

1212201000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3116819.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1212201000001 its reverse (1000001022121), we get a palindrome (2212202022122).

The spelling of 1212201000001 in words is "one trillion, two hundred twelve billion, two hundred one million, one", and thus it is an aban number.