100120011121020 has 192 divisors, whose sum is σ = 311692437504000. Its totient is φ = 23809835427840.

The previous prime is 100120011120979. The next prime is 100120011121033. The reversal of 100120011121020 is 20121110021001.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 100120011120987 and 100120011121005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 749506 + ... + 14170454.

It is an arithmetic number, because the mean of its divisors is an integer number (1623398112000).

Almost surely, 2^{100120011121020} is an apocalyptic number.

100120011121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100120011121020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155846218752000).

100120011121020 is an abundant number, since it is smaller than the sum of its proper divisors (211572426382980).

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

100120011121020 is a wasteful number, since it uses less digits than its factorization.

100120011121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13421188 (or 13421186 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 100120011121020 its reverse (20121110021001), we get a palindrome (120241121142021).

The spelling of 100120011121020 in words is "one hundred trillion, one hundred twenty billion, eleven million, one hundred twenty-one thousand, twenty".