1021120121000 has 128 divisors (see below), whose sum is σ = 2849496399360. Its totient is φ = 334876608000.

The previous prime is 1021120120967. The next prime is 1021120121009. The reversal of 1021120121000 is 1210211201.

It is a super-2 number, since 2×1021120121000² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1021120121009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3010181 + ... + 3332180.

It is an arithmetic number, because the mean of its divisors is an integer number (22261690620).

Almost surely, 2^{1021120121000} is an apocalyptic number.

1021120121000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021120121000 is an abundant number, since it is smaller than the sum of its proper divisors (1828376278360).

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

1021120121000 is a wasteful number, since it uses less digits than its factorization.

1021120121000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6342412 (or 6342398 counting only the distinct ones).

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

Adding to 1021120121000 its reverse (1210211201), we get a palindrome (1022330332201).

The spelling of 1021120121000 in words is "one trillion, twenty-one billion, one hundred twenty million, one hundred twenty-one thousand".