1211010120001 has 8 divisors (see below), whose sum is σ = 1321110220608. Its totient is φ = 1100911398000.

The previous prime is 1211010119947. The next prime is 1211010120017. The reversal of 1211010120001 is 1000210101121.

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 1211010120001 - 2⁹ = 1211010119489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1211010120001.

It is not an unprimeable number, because it can be changed into a prime (1211010120031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2546811 + ... + 2984671.

It is an arithmetic number, because the mean of its divisors is an integer number (165138777576).

Almost surely, 2^{1211010120001} is an apocalyptic number.

1211010120001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1211010120001 is a deficient number, since it is larger than the sum of its proper divisors (110100100607).

1211010120001 is a wasteful number, since it uses less digits than its factorization.

1211010120001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689303.

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

Adding to 1211010120001 its reverse (1000210101121), we get a palindrome (2211220221122).

The spelling of 1211010120001 in words is "one trillion, two hundred eleven billion, ten million, one hundred twenty thousand, one".