102220121091 has 32 divisors (see below), whose sum is σ = 154337771520. Its totient is φ = 59618109600.

The previous prime is 102220121077. The next prime is 102220121119. The reversal of 102220121091 is 190121022201.

It is not a de Polignac number, because 102220121091 - 2¹³ = 102220112899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102220121021) 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, 95995 + ... + 462228.

It is an arithmetic number, because the mean of its divisors is an integer number (4823055360).

Almost surely, 2^102220121091 is an apocalyptic number.

102220121091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

102220121091 is a deficient number, since it is larger than the sum of its proper divisors (52117650429).

102220121091 is a wasteful number, since it uses less digits than its factorization.

102220121091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558447.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 102220121091 its reverse (190121022201), we get a palindrome (292341143292).

The spelling of 102220121091 in words is "one hundred two billion, two hundred twenty million, one hundred twenty-one thousand, ninety-one".