1211100201001 has 16 divisors (see below), whose sum is σ = 1258927084800. Its totient is φ = 1164293856000.

The previous prime is 1211100200963. The next prime is 1211100201019. The reversal of 1211100201001 is 1001020011121.

It is a cyclic number.

It is not a de Polignac number, because 1211100201001 - 2¹⁵ = 1211100168233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211100201041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 548001 + ... + 1650001.

It is an arithmetic number, because the mean of its divisors is an integer number (78682942800).

Almost surely, 2^{1211100201001} is an apocalyptic number.

It is an amenable number.

1211100201001 is a deficient number, since it is larger than the sum of its proper divisors (47826883799).

1211100201001 is a wasteful number, since it uses less digits than its factorization.

1211100201001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102464.

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

Adding to 1211100201001 its reverse (1001020011121), we get a palindrome (2212120212122).

The spelling of 1211100201001 in words is "one trillion, two hundred eleven billion, one hundred million, two hundred one thousand, one".