100121101002220 has 24 divisors (see below), whose sum is σ = 210262447763424. Its totient is φ = 40046890751616.

The previous prime is 100121101002211. The next prime is 100121101002227. The reversal of 100121101002220 is 22200101121001.

It is a self number, because there is not a number n which added to its sum of digits gives 100121101002220.

It is not an unprimeable number, because it can be changed into a prime (100121101002227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96323217 + ... + 97357096.

It is an arithmetic number, because the mean of its divisors is an integer number (8760935323476).

Almost surely, 2^{100121101002220} is an apocalyptic number.

100121101002220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100121101002220 is an abundant number, since it is smaller than the sum of its proper divisors (110141346761204).

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

100121101002220 is a wasteful number, since it uses less digits than its factorization.

100121101002220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193706169 (or 193706167 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 100121101002220 its reverse (22200101121001), we get a palindrome (122321202123221).

The spelling of 100121101002220 in words is "one hundred trillion, one hundred twenty-one billion, one hundred one million, two thousand, two hundred twenty".