100121220222021 has 48 divisors (see below), whose sum is σ = 145794550561920. Its totient is φ = 66207515996160.

The previous prime is 100121220222011. The next prime is 100121220222029. The reversal of 100121220222021 is 120222022121001.

It is a happy number.

100121220222021 is a `hidden beast` number, since 10 + 0 + 1 + 212 + 202 + 220 + 21 = 666.

It is not a de Polignac number, because 100121220222021 - 2²⁷ = 100121086004293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100121220221985 and 100121220222003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121220222029) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1195050085 + ... + 1195133861.

It is an arithmetic number, because the mean of its divisors is an integer number (3037386470040).

Almost surely, 2^{100121220222021} is an apocalyptic number.

It is an amenable number.

100121220222021 is a deficient number, since it is larger than the sum of its proper divisors (45673330339899).

100121220222021 is a wasteful number, since it uses less digits than its factorization.

100121220222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86106 (or 86103 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 100121220222021 its reverse (120222022121001), we get a palindrome (220343242343022).

The spelling of 100121220222021 in words is "one hundred trillion, one hundred twenty-one billion, two hundred twenty million, two hundred twenty-two thousand, twenty-one".