100121221221102 has 24 divisors (see below), whose sum is σ = 221974180383384. Its totient is φ = 32597606908944.

The previous prime is 100121221221023. The next prime is 100121221221107. The reversal of 100121221221102 is 201122122121001.

100121221221102 is a `hidden beast` number, since 1 + 0 + 0 + 121 + 221 + 221 + 102 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121221221107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64677790713 + ... + 64677792260.

It is an arithmetic number, because the mean of its divisors is an integer number (9248924182641).

Almost surely, 2^{100121221221102} is an apocalyptic number.

100121221221102 is an abundant number, since it is smaller than the sum of its proper divisors (121852959162282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100121221221102 is a wasteful number, since it uses less digits than its factorization.

100121221221102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129355583024 (or 129355583021 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 100121221221102 its reverse (201122122121001), we get a palindrome (301243343342103).

The spelling of 100121221221102 in words is "one hundred trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred two".