10155266621221 has 8 divisors (see below), whose sum is σ = 10245376298880. Its totient is φ = 10065161155392.

The previous prime is 10155266621197. The next prime is 10155266621237. The reversal of 10155266621221 is 12212666255101.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10155266621221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10155266627221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3893316 + ... + 5955538.

It is an arithmetic number, because the mean of its divisors is an integer number (1280672037360).

Almost surely, 2^{10155266621221} is an apocalyptic number.

It is an amenable number.

10155266621221 is a deficient number, since it is larger than the sum of its proper divisors (90109677659).

10155266621221 is a wasteful number, since it uses less digits than its factorization.

10155266621221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2105915.

The product of its (nonzero) digits is 86400, while the sum is 40.

The spelling of 10155266621221 in words is "ten trillion, one hundred fifty-five billion, two hundred sixty-six million, six hundred twenty-one thousand, two hundred twenty-one".