1021120101020 has 48 divisors (see below), whose sum is σ = 2153185769280. Its totient is φ = 406767868416.

The previous prime is 1021120101019. The next prime is 1021120101031. The reversal of 1021120101020 is 201010211201.

It is a junction number, because it is equal to n+sod(n) for n = 1021120100992 and 1021120101010.

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, 6767561 + ... + 6916799.

It is an arithmetic number, because the mean of its divisors is an integer number (44858036860).

Almost surely, 2^{1021120101020} is an apocalyptic number.

1021120101020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021120101020 is an abundant number, since it is smaller than the sum of its proper divisors (1132065668260).

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

1021120101020 is a wasteful number, since it uses less digits than its factorization.

1021120101020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150654 (or 150652 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1021120101020 its reverse (201010211201), we get a palindrome (1222130312221).

The spelling of 1021120101020 in words is "one trillion, twenty-one billion, one hundred twenty million, one hundred one thousand, twenty".