921021001311222 has 96 divisors (see below), whose sum is σ = 2292912752532480. Its totient is φ = 261733197049920.

The previous prime is 921021001311221. The next prime is 921021001311329. The reversal of 921021001311222 is 222113100120129.

921021001311222 is a `hidden beast` number, since 9 + 21 + 0 + 2 + 100 + 1 + 311 + 222 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921021001311221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12127447 + ... + 44599517.

It is an arithmetic number, because the mean of its divisors is an integer number (23884507838880).

Almost surely, 2^{921021001311222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 921021001311222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1146456376266240).

921021001311222 is an abundant number, since it is smaller than the sum of its proper divisors (1371891751221258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

921021001311222 is a wasteful number, since it uses less digits than its factorization.

921021001311222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32473298 (or 32473295 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The spelling of 921021001311222 in words is "nine hundred twenty-one trillion, twenty-one billion, one million, three hundred eleven thousand, two hundred twenty-two".