201121120101210 has 128 divisors (see below), whose sum is σ = 508440706801920. Its totient is φ = 50775030061056.

The previous prime is 201121120101199. The next prime is 201121120101221. The reversal of 201121120101210 is 12101021121102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (201121120101199) and next prime (201121120101221).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 201121120101210.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13237741374 + ... + 13237756566.

It is an arithmetic number, because the mean of its divisors is an integer number (3972193021890).

Almost surely, 2^{201121120101210} is an apocalyptic number.

201121120101210 is an abundant number, since it is smaller than the sum of its proper divisors (307319586700710).

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

201121120101210 is a wasteful number, since it uses less digits than its factorization.

201121120101210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29472.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 201121120101210 its reverse (12101021121102), we get a palindrome (213222141222312).

The spelling of 201121120101210 in words is "two hundred one trillion, one hundred twenty-one billion, one hundred twenty million, one hundred one thousand, two hundred ten".