1020221122021 has 4 divisors (see below), whose sum is σ = 1020223524832. Its totient is φ = 1020218719212.

The previous prime is 1020221122007. The next prime is 1020221122061. The reversal of 1020221122021 is 1202211220201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1020221122021 - 2⁷ = 1020221121893 is a prime.

It is a super-2 number, since 2×1020221122021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020221121986 and 1020221122004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020221122061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375051 + ... + 1476856.

It is an arithmetic number, because the mean of its divisors is an integer number (255055881208).

Almost surely, 2^{1020221122021} is an apocalyptic number.

It is an amenable number.

1020221122021 is a deficient number, since it is larger than the sum of its proper divisors (2402811).

1020221122021 is an equidigital number, since it uses as much as digits as its factorization.

1020221122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2402810.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1020221122021 its reverse (1202211220201), we get a palindrome (2222432342222).

The spelling of 1020221122021 in words is "one trillion, twenty billion, two hundred twenty-one million, one hundred twenty-two thousand, twenty-one".