21203211434100 has 72 divisors (see below), whose sum is σ = 62263599645408. Its totient is φ = 5569798819200.

The previous prime is 21203211434063. The next prime is 21203211434117. The reversal of 21203211434100 is 143411230212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 527422971 + ... + 527463170.

Almost surely, 2^{21203211434100} is an apocalyptic number.

21203211434100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21203211434100 is an abundant number, since it is smaller than the sum of its proper divisors (41060388211308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21203211434100 is a wasteful number, since it uses less digits than its factorization.

21203211434100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054886225 (or 1054886218 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21203211434100 its reverse (143411230212), we get a palindrome (21346622664312).

The spelling of 21203211434100 in words is "twenty-one trillion, two hundred three billion, two hundred eleven million, four hundred thirty-four thousand, one hundred".