21200102030 has 16 divisors (see below), whose sum is σ = 38179560384. Its totient is φ = 8475734880.

The previous prime is 21200102009. The next prime is 21200102051. The reversal of 21200102030 is 3020100212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21200102009) and next prime (21200102051).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 517526 + ... + 556985.

It is an arithmetic number, because the mean of its divisors is an integer number (2386222524).

Almost surely, 2^21200102030 is an apocalyptic number.

21200102030 is a deficient number, since it is larger than the sum of its proper divisors (16979458354).

21200102030 is a wasteful number, since it uses less digits than its factorization.

21200102030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076491.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 21200102030 its reverse (3020100212), we get a palindrome (24220202242).

The spelling of 21200102030 in words is "twenty-one billion, two hundred million, one hundred two thousand, thirty".