2101001120100 has 72 divisors (see below), whose sum is σ = 6754329535520. Its totient is φ = 560266964640.

The previous prime is 2101001120047. The next prime is 2101001120107. The reversal of 2101001120100 is 10211001012.

It is a happy number.

It is a super-2 number, since 2×2101001120100² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (2101001120107) 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, 389071582 + ... + 389076981.

Almost surely, 2^{2101001120100} is an apocalyptic number.

2101001120100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101001120100 is an abundant number, since it is smaller than the sum of its proper divisors (4653328415420).

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

2101001120100 is a wasteful number, since it uses less digits than its factorization.

2101001120100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778148586 (or 778148573 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 2101001120100 its reverse (10211001012), we get a palindrome (2111212121112).

The spelling of 2101001120100 in words is "two trillion, one hundred one billion, one million, one hundred twenty thousand, one hundred".