2001221102700 has 72 divisors (see below), whose sum is σ = 6433555257360. Its totient is φ = 533658960000.

The previous prime is 2001221102689. The next prime is 2001221102701. The reversal of 2001221102700 is 72011221002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (2001221102701) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 370593801 + ... + 370599200.

It is an arithmetic number, because the mean of its divisors is an integer number (89354934130).

Almost surely, 2^{2001221102700} is an apocalyptic number.

2001221102700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001221102700 is an abundant number, since it is smaller than the sum of its proper divisors (4432334154660).

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

2001221102700 is a wasteful number, since it uses less digits than its factorization.

2001221102700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741193024 (or 741193011 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

Adding to 2001221102700 its reverse (72011221002), we get a palindrome (2073232323702).

The spelling of 2001221102700 in words is "two trillion, one billion, two hundred twenty-one million, one hundred two thousand, seven hundred".