2051101020 has 48 divisors (see below), whose sum is σ = 5748664320. Its totient is φ = 546428736.

The previous prime is 2051101001. The next prime is 2051101021. The reversal of 2051101020 is 201011502.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 2051100987 and 2051101005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051101021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47701 + ... + 79859.

It is an arithmetic number, because the mean of its divisors is an integer number (119763840).

Almost surely, 2^2051101020 is an apocalyptic number.

2051101020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2051101020 is an abundant number, since it is smaller than the sum of its proper divisors (3697563300).

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

2051101020 is a wasteful number, since it uses less digits than its factorization.

2051101020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33234 (or 33232 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 2051101020 is about 45289.0827904474. The cubic root of 2051101020 is about 1270.5614769868.

Adding to 2051101020 its reverse (201011502), we get a palindrome (2252112522).

The spelling of 2051101020 in words is "two billion, fifty-one million, one hundred one thousand, twenty".