1022070721 has 8 divisors (see below), whose sum is σ = 1199650880. Its totient is φ = 852383088.

The previous prime is 1022070703. The next prime is 1022070733. The reversal of 1022070721 is 1270702201.

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 1022070721 - 2¹⁵ = 1022037953 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1022070692 and 1022070701.

It is not an unprimeable number, because it can be changed into a prime (1022070701) 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, 1972851 + ... + 1973368.

It is an arithmetic number, because the mean of its divisors is an integer number (149956360).

Almost surely, 2^1022070721 is an apocalyptic number.

It is an amenable number.

1022070721 is a deficient number, since it is larger than the sum of its proper divisors (177580159).

1022070721 is an equidigital number, since it uses as much as digits as its factorization.

1022070721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3946263.

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 1022070721 is about 31969.8408034823. The cubic root of 1022070721 is about 1007.3034369531.

Adding to 1022070721 its reverse (1270702201), we get a palindrome (2292772922).

The spelling of 1022070721 in words is "one billion, twenty-two million, seventy thousand, seven hundred twenty-one".