2100001221002 has 8 divisors (see below), whose sum is σ = 3197016784416. Its totient is φ = 1034328959532.

The previous prime is 2100001220983. The next prime is 2100001221053. The reversal of 2100001221002 is 2001221000012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7835825318 + ... + 7835825585.

It is an arithmetic number, because the mean of its divisors is an integer number (399627098052).

Almost surely, 2^{2100001221002} is an apocalyptic number.

2100001221002 is a deficient number, since it is larger than the sum of its proper divisors (1097015563414).

2100001221002 is a wasteful number, since it uses less digits than its factorization.

2100001221002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15671650972.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2100001221002 its reverse (2001221000012), we get a palindrome (4101222221014).

The spelling of 2100001221002 in words is "two trillion, one hundred billion, one million, two hundred twenty-one thousand, two".