2051450121 has 24 divisors (see below), whose sum is σ = 3349310880. Its totient is φ = 1110557952.

The previous prime is 2051450057. The next prime is 2051450143. The reversal of 2051450121 is 1210541502.

It is not a de Polignac number, because 2051450121 - 2⁶ = 2051450057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (2051452121) 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, 364456 + ... + 370041.

It is an arithmetic number, because the mean of its divisors is an integer number (139554620).

Almost surely, 2^2051450121 is an apocalyptic number.

2051450121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2051450121 is a deficient number, since it is larger than the sum of its proper divisors (1297860759).

2051450121 is a wasteful number, since it uses less digits than its factorization.

2051450121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734533 (or 734526 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 2051450121 is about 45292.9367672267. The cubic root of 2051450121 is about 1270.6335568301.

Adding to 2051450121 its reverse (1210541502), we get a palindrome (3261991623).

The spelling of 2051450121 in words is "two billion, fifty-one million, four hundred fifty thousand, one hundred twenty-one".