1021011201020 has 24 divisors (see below), whose sum is σ = 2196419219568. Its totient is φ = 398443395200.

The previous prime is 1021011200969. The next prime is 1021011201071. The reversal of 1021011201020 is 201021101201.

It is an interprime number because it is at equal distance from previous prime (1021011200969) and next prime (1021011201071).

It is a junction number, because it is equal to n+sod(n) for n = 1021011200992 and 1021011201010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 622566986 + ... + 622568625.

It is an arithmetic number, because the mean of its divisors is an integer number (91517467482).

Almost surely, 2^{1021011201020} is an apocalyptic number.

1021011201020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021011201020 is an abundant number, since it is smaller than the sum of its proper divisors (1175408018548).

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

1021011201020 is a wasteful number, since it uses less digits than its factorization.

1021011201020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245135661 (or 1245135659 counting only the distinct ones).

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

Adding to 1021011201020 its reverse (201021101201), we get a palindrome (1222032302221).

The spelling of 1021011201020 in words is "one trillion, twenty-one billion, eleven million, two hundred one thousand, twenty".