971890006221 has 12 divisors (see below), whose sum is σ = 1464877690848. Its totient is φ = 619755945864.

The previous prime is 971890006183. The next prime is 971890006249. The reversal of 971890006221 is 122600098179.

971890006221 is a `hidden beast` number, since 9 + 7 + 18 + 9 + 0 + 0 + 0 + 622 + 1 = 666.

It is not a de Polignac number, because 971890006221 - 2¹⁷ = 971889875149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971890006921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2347560195 + ... + 2347560608.

It is an arithmetic number, because the mean of its divisors is an integer number (122073140904).

Almost surely, 2^971890006221 is an apocalyptic number.

It is an amenable number.

971890006221 is a deficient number, since it is larger than the sum of its proper divisors (492987684627).

971890006221 is a wasteful number, since it uses less digits than its factorization.

971890006221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4695120832 (or 4695120829 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The spelling of 971890006221 in words is "nine hundred seventy-one billion, eight hundred ninety million, six thousand, two hundred twenty-one".