100121012022222 has 48 divisors (see below), whose sum is σ = 228413868642960. Its totient is φ = 31607787724416.

The previous prime is 100121012022181. The next prime is 100121012022233. The reversal of 100121012022222 is 222220210121001.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 100121012022195 and 100121012022204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42242743 + ... + 44549874.

It is an arithmetic number, because the mean of its divisors is an integer number (4758622263395).

Almost surely, 2^{100121012022222} is an apocalyptic number.

100121012022222 is an abundant number, since it is smaller than the sum of its proper divisors (128292856620738).

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

100121012022222 is a wasteful number, since it uses less digits than its factorization.

100121012022222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86796017 (or 86796014 counting only the distinct ones).

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

Adding to 100121012022222 its reverse (222220210121001), we get a palindrome (322341222143223).

The spelling of 100121012022222 in words is "one hundred trillion, one hundred twenty-one billion, twelve million, twenty-two thousand, two hundred twenty-two".