1202020521 has 8 divisors (see below), whose sum is σ = 1725978240. Its totient is φ = 739704912.

The previous prime is 1202020481. The next prime is 1202020529. The reversal of 1202020521 is 1250202021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1202020521 - 2¹⁵ = 1201987753 is a prime.

It is a super-2 number, since 2×1202020521² = 2889706665810222882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1202020521.

It is not an unprimeable number, because it can be changed into a prime (1202020529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15410481 + ... + 15410558.

It is an arithmetic number, because the mean of its divisors is an integer number (215747280).

Almost surely, 2^1202020521 is an apocalyptic number.

It is an amenable number.

1202020521 is a deficient number, since it is larger than the sum of its proper divisors (523957719).

1202020521 is a wasteful number, since it uses less digits than its factorization.

1202020521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30821055.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1202020521 is about 34670.1675940570. The cubic root of 1202020521 is about 1063.2546580701.

Adding to 1202020521 its reverse (1250202021), we get a palindrome (2452222542).

The spelling of 1202020521 in words is "one billion, two hundred two million, twenty thousand, five hundred twenty-one".