2121203101220 has 24 divisors (see below), whose sum is σ = 5090887443264. Its totient is φ = 727269634656.

The previous prime is 2121203101201. The next prime is 2121203101229. The reversal of 2121203101220 is 221013021212.

It is not an unprimeable number, because it can be changed into a prime (2121203101229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7575725222 + ... + 7575725501.

It is an arithmetic number, because the mean of its divisors is an integer number (212120310136).

Almost surely, 2^{2121203101220} is an apocalyptic number.

2121203101220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121203101220 is an abundant number, since it is smaller than the sum of its proper divisors (2969684342044).

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

2121203101220 is a wasteful number, since it uses less digits than its factorization.

2121203101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15151450739 (or 15151450737 counting only the distinct ones).

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

Adding to 2121203101220 its reverse (221013021212), we get a palindrome (2342216122432).

The spelling of 2121203101220 in words is "two trillion, one hundred twenty-one billion, two hundred three million, one hundred one thousand, two hundred twenty".