1022011221 has 16 divisors (see below), whose sum is σ = 1698928128. Its totient is φ = 530914800.

The previous prime is 1022011213. The next prime is 1022011247. The reversal of 1022011221 is 1221102201.

It is not a de Polignac number, because 1022011221 - 2³ = 1022011213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1022011197 and 1022011206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022013221) 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, 2211915 + ... + 2212376.

It is an arithmetic number, because the mean of its divisors is an integer number (106183008).

Almost surely, 2^1022011221 is an apocalyptic number.

1022011221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1022011221 is a deficient number, since it is larger than the sum of its proper divisors (676916907).

1022011221 is a wasteful number, since it uses less digits than its factorization.

1022011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4424312.

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

The square root of 1022011221 is about 31968.9102254049. The cubic root of 1022011221 is about 1007.2838898003.

Adding to 1022011221 its reverse (1221102201), we get a palindrome (2243113422).

It can be divided in two parts, 102201 and 1221, that multiplied together give a palindrome (124787421).

The spelling of 1022011221 in words is "one billion, twenty-two million, eleven thousand, two hundred twenty-one".