890021001311221 has 16 divisors (see below), whose sum is σ = 969259958049600. Its totient is φ = 812321565314688.

The previous prime is 890021001311173. The next prime is 890021001311297. The reversal of 890021001311221 is 122113100120098.

It is not a de Polignac number, because 890021001311221 - 2⁹ = 890021001310709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (890021001311021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180862890 + ... + 185718676.

It is an arithmetic number, because the mean of its divisors is an integer number (60578747378100).

Almost surely, 2^{890021001311221} is an apocalyptic number.

It is an amenable number.

890021001311221 is a deficient number, since it is larger than the sum of its proper divisors (79238956738379).

890021001311221 is a wasteful number, since it uses less digits than its factorization.

890021001311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5014308.

The product of its (nonzero) digits is 1728, while the sum is 31.

The spelling of 890021001311221 in words is "eight hundred ninety trillion, twenty-one billion, one million, three hundred eleven thousand, two hundred twenty-one".