2001202221020 has 48 divisors (see below), whose sum is σ = 4307106521088. Its totient is φ = 780680904000.

The previous prime is 2001202221013. The next prime is 2001202221043. The reversal of 2001202221020 is 201222021002.

It is a junction number, because it is equal to n+sod(n) for n = 2001202220986 and 2001202221004.

It is a congruent number.

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, 3495356 + ... + 4027395.

It is an arithmetic number, because the mean of its divisors is an integer number (89731385856).

Almost surely, 2^{2001202221020} is an apocalyptic number.

2001202221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001202221020 is an abundant number, since it is smaller than the sum of its proper divisors (2305904300068).

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

2001202221020 is a wasteful number, since it uses less digits than its factorization.

2001202221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7523090 (or 7523088 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 2001202221020 its reverse (201222021002), we get a palindrome (2202424242022).

It can be divided in two parts, 2001202 and 221020, that added together give a palindrome (2222222).

The spelling of 2001202221020 in words is "two trillion, one billion, two hundred two million, two hundred twenty-one thousand, twenty".