2121101101210 has 48 divisors (see below), whose sum is σ = 4724873755776. Its totient is φ = 671293531584.

The previous prime is 2121101101201. The next prime is 2121101101271. The reversal of 2121101101210 is 121011011212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

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, 89637414 + ... + 89661073.

It is an arithmetic number, because the mean of its divisors is an integer number (98434869912).

Almost surely, 2^{2121101101210} is an apocalyptic number.

2121101101210 is an abundant number, since it is smaller than the sum of its proper divisors (2603772654566).

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

2121101101210 is a wasteful number, since it uses less digits than its factorization.

2121101101210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179298527 (or 179298514 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 2121101101210 its reverse (121011011212), we get a palindrome (2242112112422).

The spelling of 2121101101210 in words is "two trillion, one hundred twenty-one billion, one hundred one million, one hundred one thousand, two hundred ten".