100121012012220 has 48 divisors (see below), whose sum is σ = 280340679876768. Its totient is φ = 26698760704000.

The previous prime is 100121012012183. The next prime is 100121012012237. The reversal of 100121012012220 is 22210210121001.

It is a super-2 number, since 2×100121012012220² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 100121012012220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3822292 + ... + 14657828.

It is an arithmetic number, because the mean of its divisors is an integer number (5840430830766).

Almost surely, 2^{100121012012220} is an apocalyptic number.

100121012012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100121012012220 is an abundant number, since it is smaller than the sum of its proper divisors (180219667864548).

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

100121012012220 is a wasteful number, since it uses less digits than its factorization.

100121012012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10989550 (or 10989548 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 100121012012220 its reverse (22210210121001), we get a palindrome (122331222133221).

The spelling of 100121012012220 in words is "one hundred trillion, one hundred twenty-one billion, twelve million, twelve thousand, two hundred twenty".