10121221020020 has 96 divisors (see below), whose sum is σ = 24438915285120. Its totient is φ = 3486484252160.

The previous prime is 10121221020019. The next prime is 10121221020121. The reversal of 10121221020020 is 2002012212101.

It is a super-2 number, since 2×10121221020020² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10121221019977 and 10121221020004.

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, 14627882 + ... + 15304161.

It is an arithmetic number, because the mean of its divisors is an integer number (254572034220).

Almost surely, 2^{10121221020020} is an apocalyptic number.

10121221020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10121221020020 is an abundant number, since it is smaller than the sum of its proper divisors (14317694265100).

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

10121221020020 is a wasteful number, since it uses less digits than its factorization.

10121221020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29932145 (or 29932143 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 10121221020020 its reverse (2002012212101), we get a palindrome (12123233232121).

The spelling of 10121221020020 in words is "ten trillion, one hundred twenty-one billion, two hundred twenty-one million, twenty thousand, twenty".