1021121403320 has 32 divisors (see below), whose sum is σ = 2331814554000. Its totient is φ = 402352313088.

The previous prime is 1021121403287. The next prime is 1021121403361. The reversal of 1021121403320 is 233041211201.

It is a super-2 number, since 2×1021121403320² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1021121403292 and 1021121403301.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190505045 + ... + 190510404.

Almost surely, 2^{1021121403320} is an apocalyptic number.

1021121403320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021121403320 is an abundant number, since it is smaller than the sum of its proper divisors (1310693150680).

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

1021121403320 is a wasteful number, since it uses less digits than its factorization.

1021121403320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381015527 (or 381015523 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1021121403320 its reverse (233041211201), we get a palindrome (1254162614521).

The spelling of 1021121403320 in words is "one trillion, twenty-one billion, one hundred twenty-one million, four hundred three thousand, three hundred twenty".