1001212221020 has 96 divisors (see below), whose sum is σ = 2422738999296. Its totient is φ = 344138860800.

The previous prime is 1001212221017. The next prime is 1001212221043. The reversal of 1001212221020 is 201222121001.

1001212221020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1001212220986 and 1001212221004.

It is a congruent number.

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, 1413779 + ... + 2000298.

It is an arithmetic number, because the mean of its divisors is an integer number (25236864576).

Almost surely, 2^{1001212221020} is an apocalyptic number.

1001212221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001212221020 is an abundant number, since it is smaller than the sum of its proper divisors (1421526778276).

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

1001212221020 is a wasteful number, since it uses less digits than its factorization.

1001212221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3414171 (or 3414169 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1001212221020 its reverse (201222121001), we get a palindrome (1202434342021).

The spelling of 1001212221020 in words is "one trillion, one billion, two hundred twelve million, two hundred twenty-one thousand, twenty".