2021433020651 has 16 divisors (see below), whose sum is σ = 2285293167360. Its totient is φ = 1771146911520.

The previous prime is 2021433020617. The next prime is 2021433020657. The reversal of 2021433020651 is 1560203341202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2021433020651 - 2⁶ = 2021433020587 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021433020657) 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, 5448095 + ... + 5807288.

It is an arithmetic number, because the mean of its divisors is an integer number (142830822960).

Almost surely, 2^{2021433020651} is an apocalyptic number.

2021433020651 is a deficient number, since it is larger than the sum of its proper divisors (263860146709).

2021433020651 is a wasteful number, since it uses less digits than its factorization.

2021433020651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11255986.

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 2021433020651 its reverse (1560203341202), we get a palindrome (3581636361853).

The spelling of 2021433020651 in words is "two trillion, twenty-one billion, four hundred thirty-three million, twenty thousand, six hundred fifty-one".