1021012211020 has 96 divisors (see below), whose sum is σ = 2213908708032. Its totient is φ = 395332973568.

The previous prime is 1021012210931. The next prime is 1021012211077. The reversal of 1021012211020 is 201122101201.

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, 68001034 + ... + 68016046.

It is an arithmetic number, because the mean of its divisors is an integer number (23061549042).

Almost surely, 2^{1021012211020} is an apocalyptic number.

1021012211020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021012211020 is an abundant number, since it is smaller than the sum of its proper divisors (1192896497012).

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

1021012211020 is a wasteful number, since it uses less digits than its factorization.

1021012211020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15931 (or 15929 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1021012211020 its reverse (201122101201), we get a palindrome (1222134312221).

The spelling of 1021012211020 in words is "one trillion, twenty-one billion, twelve million, two hundred eleven thousand, twenty".