1022001120021 has 16 divisors (see below), whose sum is σ = 1557404112384. Its totient is φ = 583974737904.

The previous prime is 1022001119983. The next prime is 1022001120029. The reversal of 1022001120021 is 1200211002201.

It is not a de Polignac number, because 1022001120021 - 2⁶ = 1022001119957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1022001119979 and 1022001120006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022001120029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 589335 + ... + 1546388.

It is an arithmetic number, because the mean of its divisors is an integer number (97337757024).

Almost surely, 2^{1022001120021} is an apocalyptic number.

It is an amenable number.

1022001120021 is a deficient number, since it is larger than the sum of its proper divisors (535402992363).

1022001120021 is a wasteful number, since it uses less digits than its factorization.

1022001120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2158520.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1022001120021 its reverse (1200211002201), we get a palindrome (2222212122222).

It can be divided in two parts, 102200 and 1120021, that added together give a palindrome (1222221).

The spelling of 1022001120021 in words is "one trillion, twenty-two billion, one million, one hundred twenty thousand, twenty-one".