101220221222121 has 16 divisors (see below), whose sum is σ = 137632753177920. Its totient is φ = 66146252402880.

The previous prime is 101220221222111. The next prime is 101220221222123. The reversal of 101220221222121 is 121222122022101.

It is not a de Polignac number, because 101220221222121 - 2⁷ = 101220221221993 is a prime.

It is a super-2 number, since 2×101220221222121² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (101220221222123) 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, 291579586 + ... + 291926523.

It is an arithmetic number, because the mean of its divisors is an integer number (8602047073620).

Almost surely, 2^{101220221222121} is an apocalyptic number.

It is an amenable number.

101220221222121 is a deficient number, since it is larger than the sum of its proper divisors (36412531955799).

101220221222121 is a wasteful number, since it uses less digits than its factorization.

101220221222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583507256.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 101220221222121 its reverse (121222122022101), we get a palindrome (222442343244222).

The spelling of 101220221222121 in words is "one hundred one trillion, two hundred twenty billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred twenty-one".