1226101201921 has 8 divisors (see below), whose sum is σ = 1298313160200. Its totient is φ = 1153899061248.

The previous prime is 1226101201889. The next prime is 1226101201937. The reversal of 1226101201921 is 1291021016221.

It can be written as a sum of positive squares in 4 ways, for example, as 187004353600 + 1039096848321 = 432440^2 + 1019361^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1226101201921 - 2⁵ = 1226101201889 is a prime.

It is a super-3 number, since 3×1226101201921³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1226101201921.

It is not an unprimeable number, because it can be changed into a prime (1226101201991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2196496 + ... + 2697553.

It is an arithmetic number, because the mean of its divisors is an integer number (162289145025).

Almost surely, 2^{1226101201921} is an apocalyptic number.

It is an amenable number.

1226101201921 is a deficient number, since it is larger than the sum of its proper divisors (72211958279).

1226101201921 is a wasteful number, since it uses less digits than its factorization.

1226101201921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4908803.

The product of its (nonzero) digits is 864, while the sum is 28.

The spelling of 1226101201921 in words is "one trillion, two hundred twenty-six billion, one hundred one million, two hundred one thousand, nine hundred twenty-one".