221020121210019 has 32 divisors (see below), whose sum is σ = 303031603768320. Its totient is φ = 143205212908800.

The previous prime is 221020121209967. The next prime is 221020121210023. The reversal of 221020121210019 is 910012121020122.

It is not a de Polignac number, because 221020121210019 - 2¹⁶ = 221020121144483 is a prime.

It is a super-2 number, since 2×221020121210019² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221020121210519) 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 31 ways as a sum of consecutive naturals, for example, 279168577 + ... + 279959165.

It is an arithmetic number, because the mean of its divisors is an integer number (9469737617760).

Almost surely, 2^{221020121210019} is an apocalyptic number.

221020121210019 is a deficient number, since it is larger than the sum of its proper divisors (82011482558301).

221020121210019 is a wasteful number, since it uses less digits than its factorization.

221020121210019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799291.

The product of its (nonzero) digits is 288, while the sum is 24.

The spelling of 221020121210019 in words is "two hundred twenty-one trillion, twenty billion, one hundred twenty-one million, two hundred ten thousand, nineteen".