100121222220220 has 24 divisors (see below), whose sum is σ = 210558842475408. Its totient is φ = 39990531590400.

The previous prime is 100121222220163. The next prime is 100121222220259. The reversal of 100121222220220 is 22022222121001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3622316941 + ... + 3622344580.

It is an arithmetic number, because the mean of its divisors is an integer number (8773285103142).

Almost surely, 2^{100121222220220} is an apocalyptic number.

100121222220220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100121222220220 is an abundant number, since it is smaller than the sum of its proper divisors (110437620255188).

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

100121222220220 is a wasteful number, since it uses less digits than its factorization.

100121222220220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7244662221 (or 7244662219 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 100121222220220 its reverse (22022222121001), we get a palindrome (122143444341221).

The spelling of 100121222220220 in words is "one hundred trillion, one hundred twenty-one billion, two hundred twenty-two million, two hundred twenty thousand, two hundred twenty".