1021213542000 has 160 divisors (see below), whose sum is σ = 3381376774464. Its totient is φ = 264963456000.

The previous prime is 1021213541981. The next prime is 1021213542007. The reversal of 1021213542000 is 2453121201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021213542007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2078031 + ... + 2522030.

Almost surely, 2^{1021213542000} is an apocalyptic number.

1021213542000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021213542000 is an abundant number, since it is smaller than the sum of its proper divisors (2360163232464).

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

1021213542000 is a wasteful number, since it uses less digits than its factorization.

1021213542000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4600124 (or 4600108 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 1021213542000 its reverse (2453121201), we get a palindrome (1023666663201).

The spelling of 1021213542000 in words is "one trillion, twenty-one billion, two hundred thirteen million, five hundred forty-two thousand".