2001211022202 has 128 divisors (see below), whose sum is σ = 4734183573504. Its totient is φ = 552093954048.

The previous prime is 2001211022197. The next prime is 2001211022207. The reversal of 2001211022202 is 2022201121002.

It is an interprime number because it is at equal distance from previous prime (2001211022197) and next prime (2001211022207).

It is not an unprimeable number, because it can be changed into a prime (2001211022207) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 166942453 + ... + 166954439.

It is an arithmetic number, because the mean of its divisors is an integer number (36985809168).

Almost surely, 2^{2001211022202} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2001211022202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2367091786752).

2001211022202 is an abundant number, since it is smaller than the sum of its proper divisors (2732972551302).

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

2001211022202 is a wasteful number, since it uses less digits than its factorization.

2001211022202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13092.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2001211022202 its reverse (2022201121002), we get a palindrome (4023412143204).

The spelling of 2001211022202 in words is "two trillion, one billion, two hundred eleven million, twenty-two thousand, two hundred two".