1021211201101 has 24 divisors (see below), whose sum is σ = 1263867803520. Its totient is φ = 807935933376.

The previous prime is 1021211201099. The next prime is 1021211201123. The reversal of 1021211201101 is 1011021121201.

It is a happy number.

It is not a de Polignac number, because 1021211201101 - 2¹ = 1021211201099 is a prime.

It is a super-2 number, since 2×1021211201101² (a number of 25 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021211201191) 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 23 ways as a sum of consecutive naturals, for example, 31052695 + ... + 31085563.

It is an arithmetic number, because the mean of its divisors is an integer number (52661158480).

Almost surely, 2^{1021211201101} is an apocalyptic number.

It is an amenable number.

1021211201101 is a deficient number, since it is larger than the sum of its proper divisors (242656602419).

1021211201101 is a wasteful number, since it uses less digits than its factorization.

1021211201101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59165 (or 59152 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1021211201101 its reverse (1011021121201), we get a palindrome (2032232322302).

The spelling of 1021211201101 in words is "one trillion, twenty-one billion, two hundred eleven million, two hundred one thousand, one hundred one".