10212111121020 has 96 divisors (see below), whose sum is σ = 28960295992320. Its totient is φ = 2688346402560.

The previous prime is 10212111121019. The next prime is 10212111121061. The reversal of 10212111121020 is 2012111121201.

It is a happy number.

It is a super-2 number, since 2×10212111121020² (a number of 27 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31411419 + ... + 31734861.

It is an arithmetic number, because the mean of its divisors is an integer number (301669749920).

Almost surely, 2^{10212111121020} is an apocalyptic number.

10212111121020 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 10212111121020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14480147996160).

10212111121020 is an abundant number, since it is smaller than the sum of its proper divisors (18748184871300).

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

10212111121020 is a wasteful number, since it uses less digits than its factorization.

10212111121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330195 (or 330193 counting only the distinct ones).

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

Adding to 10212111121020 its reverse (2012111121201), we get a palindrome (12224222242221).

The spelling of 10212111121020 in words is "ten trillion, two hundred twelve billion, one hundred eleven million, one hundred twenty-one thousand, twenty".