1021203520434 has 24 divisors (see below), whose sum is σ = 2212718236560. Its totient is φ = 340384156728.

The previous prime is 1021203520411. The next prime is 1021203520523. The reversal of 1021203520434 is 4340253021201.

1021203520434 is a `hidden beast` number, since 1 + 0 + 2 + 1 + 203 + 5 + 20 + 434 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1021203520398 and 1021203520407.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1045344 + ... + 1770635.

It is an arithmetic number, because the mean of its divisors is an integer number (92196593190).

Almost surely, 2^{1021203520434} is an apocalyptic number.

1021203520434 is an abundant number, since it is smaller than the sum of its proper divisors (1191514716126).

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

1021203520434 is a wasteful number, since it uses less digits than its factorization.

1021203520434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2836134 (or 2836131 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 1021203520434 its reverse (4340253021201), we get a palindrome (5361456541635).

The spelling of 1021203520434 in words is "one trillion, twenty-one billion, two hundred three million, five hundred twenty thousand, four hundred thirty-four".