21203143222 has 32 divisors (see below), whose sum is σ = 34019758080. Its totient is φ = 9894044160.

The previous prime is 21203143207. The next prime is 21203143237. The reversal of 21203143222 is 22234130212.

It is an interprime number because it is at equal distance from previous prime (21203143207) and next prime (21203143237).

It is a junction number, because it is equal to n+sod(n) for n = 21203143193 and 21203143202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160278 + ... + 260950.

It is an arithmetic number, because the mean of its divisors is an integer number (1063117440).

Almost surely, 2^21203143222 is an apocalyptic number.

21203143222 is a deficient number, since it is larger than the sum of its proper divisors (12816614858).

21203143222 is a wasteful number, since it uses less digits than its factorization.

21203143222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100828.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21203143222 its reverse (22234130212), we get a palindrome (43437273434).

The spelling of 21203143222 in words is "twenty-one billion, two hundred three million, one hundred forty-three thousand, two hundred twenty-two".