2150551242021 has 16 divisors (see below), whose sum is σ = 3529109730944. Its totient is φ = 1134356698944.

The previous prime is 2150551242001. The next prime is 2150551242053. The reversal of 2150551242021 is 1202421550512.

It is not a de Polignac number, because 2150551242021 - 2²² = 2150547047717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2150551242021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2150551242001) 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, 3938738266 + ... + 3938738811.

It is an arithmetic number, because the mean of its divisors is an integer number (220569358184).

Almost surely, 2^{2150551242021} is an apocalyptic number.

2150551242021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2150551242021 is a deficient number, since it is larger than the sum of its proper divisors (1378558488923).

2150551242021 is a wasteful number, since it uses less digits than its factorization.

2150551242021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7877477100.

The product of its (nonzero) digits is 8000, while the sum is 30.

Adding to 2150551242021 its reverse (1202421550512), we get a palindrome (3352972792533).

The spelling of 2150551242021 in words is "two trillion, one hundred fifty billion, five hundred fifty-one million, two hundred forty-two thousand, twenty-one".