2121203401100 has 72 divisors (see below), whose sum is σ = 5314817434080. Its totient is φ = 719772088320.

The previous prime is 2121203401069. The next prime is 2121203401103. The reversal of 2121203401100 is 11043021212.

It is not an unprimeable number, because it can be changed into a prime (2121203401103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15552155 + ... + 15687954.

Almost surely, 2^{2121203401100} is an apocalyptic number.

2121203401100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121203401100 is an abundant number, since it is smaller than the sum of its proper divisors (3193614032980).

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

2121203401100 is a wasteful number, since it uses less digits than its factorization.

2121203401100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31240227 (or 31240220 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 2121203401100 its reverse (11043021212), we get a palindrome (2132246422312).

The spelling of 2121203401100 in words is "two trillion, one hundred twenty-one billion, two hundred three million, four hundred one thousand, one hundred".