21203122103102 has 4 divisors (see below), whose sum is σ = 31804683154656. Its totient is φ = 10601561051550.

The previous prime is 21203122103099. The next prime is 21203122103183. The reversal of 21203122103102 is 20130122130212.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5300780525774 + ... + 5300780525777.

It is an arithmetic number, because the mean of its divisors is an integer number (7951170788664).

Almost surely, 2^{21203122103102} is an apocalyptic number.

21203122103102 is a deficient number, since it is larger than the sum of its proper divisors (10601561051554).

21203122103102 is a wasteful number, since it uses less digits than its factorization.

21203122103102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10601561051553.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21203122103102 its reverse (20130122130212), we get a palindrome (41333244233314).

The spelling of 21203122103102 in words is "twenty-one trillion, two hundred three billion, one hundred twenty-two million, one hundred three thousand, one hundred two".