1221101211301 has 4 divisors (see below), whose sum is σ = 1223738579392. Its totient is φ = 1218463843212.

The previous prime is 1221101211283. The next prime is 1221101211329. The reversal of 1221101211301 is 1031121011221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1221101211301 - 2⁹ = 1221101210789 is a prime.

It is a super-2 number, since 2×1221101211301² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221101211331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1318683351 + ... + 1318684276.

It is an arithmetic number, because the mean of its divisors is an integer number (305934644848).

Almost surely, 2^{1221101211301} is an apocalyptic number.

It is an amenable number.

1221101211301 is a deficient number, since it is larger than the sum of its proper divisors (2637368091).

1221101211301 is an equidigital number, since it uses as much as digits as its factorization.

1221101211301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2637368090.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 1221101211301 its reverse (1031121011221), we get a palindrome (2252222222522).

The spelling of 1221101211301 in words is "one trillion, two hundred twenty-one billion, one hundred one million, two hundred eleven thousand, three hundred one".