201220021002 has 128 divisors (see below), whose sum is σ = 554943449088. Its totient is φ = 46940601600.

The previous prime is 201220021001. The next prime is 201220021003. The reversal of 201220021002 is 200120022102.

It is an interprime number because it is at equal distance from previous prime (201220021001) and next prime (201220021003).

It is not an unprimeable number, because it can be changed into a prime (201220021001) 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, 230524 + ... + 674967.

It is an arithmetic number, because the mean of its divisors is an integer number (4335495696).

Almost surely, 2^201220021002 is an apocalyptic number.

201220021002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

201220021002 is an abundant number, since it is smaller than the sum of its proper divisors (353723428086).

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

201220021002 is a wasteful number, since it uses less digits than its factorization.

201220021002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905564.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 201220021002 its reverse (200120022102), we get a palindrome (401340043104).

The spelling of 201220021002 in words is "two hundred one billion, two hundred twenty million, twenty-one thousand, two".