1022001220021 has 8 divisors (see below), whose sum is σ = 1072263577088. Its totient is φ = 972819774000.

The previous prime is 1022001220003. The next prime is 1022001220039. The reversal of 1022001220021 is 1200221002201.

It is a happy number.

1022001220021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1022001220003) and next prime (1022001220039).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1022001220021 - 2⁵ = 1022001219989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1022001219983 and 1022001220010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022001220421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270225825 + ... + 270229606.

It is an arithmetic number, because the mean of its divisors is an integer number (134032947136).

Almost surely, 2^{1022001220021} is an apocalyptic number.

It is an amenable number.

1022001220021 is a deficient number, since it is larger than the sum of its proper divisors (50262357067).

1022001220021 is an equidigital number, since it uses as much as digits as its factorization.

1022001220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540455523.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1022001220021 its reverse (1200221002201), we get a palindrome (2222222222222).

The spelling of 1022001220021 in words is "one trillion, twenty-two billion, one million, two hundred twenty thousand, twenty-one".