1001022021252 has 48 divisors (see below), whose sum is σ = 2831173396800. Its totient is φ = 303340006080.

The previous prime is 1001022021217. The next prime is 1001022021277. The reversal of 1001022021252 is 2521202201001.

1001022021252 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 421304377 + ... + 421306752.

It is an arithmetic number, because the mean of its divisors is an integer number (58982779100).

Almost surely, 2^{1001022021252} is an apocalyptic number.

1001022021252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1001022021252 is an abundant number, since it is smaller than the sum of its proper divisors (1830151375548).

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

1001022021252 is a wasteful number, since it uses less digits than its factorization.

1001022021252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842611153 (or 842611145 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

Adding to 1001022021252 its reverse (2521202201001), we get a palindrome (3522224222253).

The spelling of 1001022021252 in words is "one trillion, one billion, twenty-two million, twenty-one thousand, two hundred fifty-two".