21203111030 has 16 divisors (see below), whose sum is σ = 38170518624. Its totient is φ = 8480151360.

The previous prime is 21203111029. The next prime is 21203111051. The reversal of 21203111030 is 3011130212.

It is a junction number, because it is equal to n+sod(n) for n = 21203110996 and 21203111014.

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, 52706 + ... + 212565.

It is an arithmetic number, because the mean of its divisors is an integer number (2385657414).

Almost surely, 2^21203111030 is an apocalyptic number.

21203111030 is a deficient number, since it is larger than the sum of its proper divisors (16967407594).

21203111030 is a wasteful number, since it uses less digits than its factorization.

21203111030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273271.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21203111030 its reverse (3011130212), we get a palindrome (24214241242).

The spelling of 21203111030 in words is "twenty-one billion, two hundred three million, one hundred eleven thousand, thirty".