1201167126221 has 4 divisors (see below), whose sum is σ = 1215639019392. Its totient is φ = 1186695233052.

The previous prime is 1201167126179. The next prime is 1201167126223. The reversal of 1201167126221 is 1226217611021.

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 1201167126221 - 2³⁸ = 926289219277 is a prime.

It is a super-2 number, since 2×1201167126221² (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 (1201167126223) 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 3 ways as a sum of consecutive naturals, for example, 7235946461 + ... + 7235946626.

It is an arithmetic number, because the mean of its divisors is an integer number (303909754848).

Almost surely, 2^{1201167126221} is an apocalyptic number.

It is an amenable number.

1201167126221 is a deficient number, since it is larger than the sum of its proper divisors (14471893171).

1201167126221 is an equidigital number, since it uses as much as digits as its factorization.

1201167126221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14471893170.

The product of its (nonzero) digits is 4032, while the sum is 32.

The spelling of 1201167126221 in words is "one trillion, two hundred one billion, one hundred sixty-seven million, one hundred twenty-six thousand, two hundred twenty-one".