1211031100201 has 16 divisors (see below), whose sum is σ = 1322751741696. Its totient is φ = 1102020708096.

The previous prime is 1211031100193. The next prime is 1211031100229. The reversal of 1211031100201 is 1020011301121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1211031100201 - 2³ = 1211031100193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211031100241) 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, 712480 + ... + 1711633.

It is an arithmetic number, because the mean of its divisors is an integer number (82671983856).

Almost surely, 2^{1211031100201} is an apocalyptic number.

It is an amenable number.

1211031100201 is a deficient number, since it is larger than the sum of its proper divisors (111720641495).

1211031100201 is a wasteful number, since it uses less digits than its factorization.

1211031100201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2424672.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 1211031100201 its reverse (1020011301121), we get a palindrome (2231042401322).

The spelling of 1211031100201 in words is "one trillion, two hundred eleven billion, thirty-one million, one hundred thousand, two hundred one".