1022020210121 has 4 divisors (see below), whose sum is σ = 1022076110100. Its totient is φ = 1021964310144.

The previous prime is 1022020210103. The next prime is 1022020210139. The reversal of 1022020210121 is 1210120202201.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1022020210103) and next prime (1022020210139).

It can be written as a sum of positive squares in 2 ways, for example, as 954409809721 + 67610400400 = 976939^2 + 260020^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022020210121 - 2¹⁴ = 1022020193737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1022020210096 and 1022020210105.

It is not an unprimeable number, because it can be changed into a prime (1022020210151) 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, 27922556 + ... + 27959133.

It is an arithmetic number, because the mean of its divisors is an integer number (255519027525).

Almost surely, 2^{1022020210121} is an apocalyptic number.

It is an amenable number.

1022020210121 is a deficient number, since it is larger than the sum of its proper divisors (55899979).

1022020210121 is an equidigital number, since it uses as much as digits as its factorization.

1022020210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55899978.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1022020210121 its reverse (1210120202201), we get a palindrome (2232140412322).

The spelling of 1022020210121 in words is "one trillion, twenty-two billion, twenty million, two hundred ten thousand, one hundred twenty-one".