21132102050 has 24 divisors (see below), whose sum is σ = 39844151076. Its totient is φ = 8337047040.

The previous prime is 21132102001. The next prime is 21132102053. The reversal of 21132102050 is 5020123112.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 12471752329 + 8660349721 = 111677^2 + 93061^2 .

It is a super-3 number, since 3×21132102050³ (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 (21132102053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2891159 + ... + 2898458.

Almost surely, 2^21132102050 is an apocalyptic number.

21132102050 is a deficient number, since it is larger than the sum of its proper divisors (18712049026).

21132102050 is a wasteful number, since it uses less digits than its factorization.

21132102050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5789702 (or 5789697 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

Adding to 21132102050 its reverse (5020123112), we get a palindrome (26152225162).

The spelling of 21132102050 in words is "twenty-one billion, one hundred thirty-two million, one hundred two thousand, fifty".