10121011112220 has 384 divisors, whose sum is σ = 31261749120000. Its totient is φ = 2436598112256.

The previous prime is 10121011112159. The next prime is 10121011112231. The reversal of 10121011112220 is 2221111012101.

It is a happy number.

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 10121011112220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1821305682 + ... + 1821311238.

It is an arithmetic number, because the mean of its divisors is an integer number (81410805000).

Almost surely, 2^{10121011112220} is an apocalyptic number.

10121011112220 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 10121011112220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15630874560000).

10121011112220 is an abundant number, since it is smaller than the sum of its proper divisors (21140738007780).

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

10121011112220 is a wasteful number, since it uses less digits than its factorization.

10121011112220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6325 (or 6323 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 10121011112220 its reverse (2221111012101), we get a palindrome (12342122124321).

The spelling of 10121011112220 in words is "ten trillion, one hundred twenty-one billion, eleven million, one hundred twelve thousand, two hundred twenty".