21201001050 has 48 divisors (see below), whose sum is σ = 52594080192. Its totient is φ = 5651923200.

The previous prime is 21201001049. The next prime is 21201001051. The reversal of 21201001050 is 5010010212.

It is an interprime number because it is at equal distance from previous prime (21201001049) and next prime (21201001051).

It is a super-3 number, since 3×21201001050³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (21201001051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 535435 + ... + 573665.

It is an arithmetic number, because the mean of its divisors is an integer number (1095710004).

Almost surely, 2^21201001050 is an apocalyptic number.

21201001050 is an abundant number, since it is smaller than the sum of its proper divisors (31393079142).

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

21201001050 is a wasteful number, since it uses less digits than its factorization.

21201001050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41943 (or 41938 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 12.

Adding to 21201001050 its reverse (5010010212), we get a palindrome (26211011262).

The spelling of 21201001050 in words is "twenty-one billion, two hundred one million, one thousand, fifty".