2001121121210 has 32 divisors (see below), whose sum is σ = 3813996989952. Its totient is φ = 753344369920.

The previous prime is 2001121121191. The next prime is 2001121121239. The reversal of 2001121121210 is 121211211002.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7966799 + ... + 8214141.

It is an arithmetic number, because the mean of its divisors is an integer number (119187405936).

Almost surely, 2^{2001121121210} is an apocalyptic number.

2001121121210 is a deficient number, since it is larger than the sum of its proper divisors (1812875868742).

2001121121210 is a wasteful number, since it uses less digits than its factorization.

2001121121210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294958.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2001121121210 its reverse (121211211002), we get a palindrome (2122332332212).

The spelling of 2001121121210 in words is "two trillion, one billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred ten".