1202021100020 has 48 divisors (see below), whose sum is σ = 2719360253568. Its totient is φ = 443669166720.

The previous prime is 1202021100019. The next prime is 1202021100031. The reversal of 1202021100020 is 200011202021.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1202021099974 and 1202021100010.

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, 50066 + ... + 1551305.

It is an arithmetic number, because the mean of its divisors is an integer number (56653338616).

Almost surely, 2^{1202021100020} is an apocalyptic number.

1202021100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1202021100020 is an abundant number, since it is smaller than the sum of its proper divisors (1517339153548).

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

1202021100020 is a wasteful number, since it uses less digits than its factorization.

1202021100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1604280 (or 1604278 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1202021100020 its reverse (200011202021), we get a palindrome (1402032302041).

The spelling of 1202021100020 in words is "one trillion, two hundred two billion, twenty-one million, one hundred thousand, twenty".