1022221020021 has 32 divisors (see below), whose sum is σ = 1407090216960. Its totient is φ = 659808973824.

The previous prime is 1022221020013. The next prime is 1022221020031. The reversal of 1022221020021 is 1200201222201.

It is not a de Polignac number, because 1022221020021 - 2³ = 1022221020013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022221020031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3990220 + ... + 4238666.

It is an arithmetic number, because the mean of its divisors is an integer number (43971569280).

Almost surely, 2^{1022221020021} is an apocalyptic number.

It is an amenable number.

1022221020021 is a deficient number, since it is larger than the sum of its proper divisors (384869196939).

1022221020021 is a wasteful number, since it uses less digits than its factorization.

1022221020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248845.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1022221020021 its reverse (1200201222201), we get a palindrome (2222422242222).

The spelling of 1022221020021 in words is "one trillion, twenty-two billion, two hundred twenty-one million, twenty thousand, twenty-one".