21520533041202 has 32 divisors (see below), whose sum is σ = 49078500694272. Its totient is φ = 6232190563584.

The previous prime is 21520533041179. The next prime is 21520533041251. The reversal of 21520533041202 is 20214033502512.

It is a self number, because there is not a number n which added to its sum of digits gives 21520533041202.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8114830138 + ... + 8114832789.

It is an arithmetic number, because the mean of its divisors is an integer number (1533703146696).

Almost surely, 2^{21520533041202} is an apocalyptic number.

21520533041202 is an abundant number, since it is smaller than the sum of its proper divisors (27557967653070).

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

21520533041202 is a wasteful number, since it uses less digits than its factorization.

21520533041202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16229662962.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 21520533041202 its reverse (20214033502512), we get a palindrome (41734566543714).

The spelling of 21520533041202 in words is "twenty-one trillion, five hundred twenty billion, five hundred thirty-three million, forty-one thousand, two hundred two".