2051212042 has 64 divisors (see below), whose sum is σ = 3544829568. Its totient is φ = 881920000.

The previous prime is 2051211997. The next prime is 2051212043. The reversal of 2051212042 is 2402121502.

It is not an unprimeable number, because it can be changed into a prime (2051212043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5115042 + ... + 5115442.

It is an arithmetic number, because the mean of its divisors is an integer number (55387962).

Almost surely, 2^2051212042 is an apocalyptic number.

2051212042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2051212042 is a deficient number, since it is larger than the sum of its proper divisors (1493617526).

2051212042 is a wasteful number, since it uses less digits than its factorization.

2051212042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 2051212042 is about 45290.3084776423. The cubic root of 2051212042 is about 1270.5844008912.

Adding to 2051212042 its reverse (2402121502), we get a palindrome (4453333544).

The spelling of 2051212042 in words is "two billion, fifty-one million, two hundred twelve thousand, forty-two".