1211021012201 has 32 divisors (see below), whose sum is σ = 1696681340928. Its totient is φ = 833191698240.

The previous prime is 1211021012197. The next prime is 1211021012207. The reversal of 1211021012201 is 1022101201121.

It is not a de Polignac number, because 1211021012201 - 2² = 1211021012197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211021012207) 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 31 ways as a sum of consecutive naturals, for example, 26277221 + ... + 26323266.

It is an arithmetic number, because the mean of its divisors is an integer number (53021291904).

Almost surely, 2^{1211021012201} is an apocalyptic number.

1211021012201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1211021012201 is a deficient number, since it is larger than the sum of its proper divisors (485660328727).

1211021012201 is a wasteful number, since it uses less digits than its factorization.

1211021012201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52600541.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1211021012201 its reverse (1022101201121), we get a palindrome (2233122213322).

The spelling of 1211021012201 in words is "one trillion, two hundred eleven billion, twenty-one million, twelve thousand, two hundred one".