1022121010021 has 12 divisors (see below), whose sum is σ = 1061734773792. Its totient is φ = 983449810728.

The previous prime is 1022121010019. The next prime is 1022121010061. The reversal of 1022121010021 is 1200101212201.

It is not a de Polignac number, because 1022121010021 - 2¹ = 1022121010019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1022121009983 and 1022121010010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022121010061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2454585 + ... + 2840638.

It is an arithmetic number, because the mean of its divisors is an integer number (88477897816).

Almost surely, 2^{1022121010021} is an apocalyptic number.

It is an amenable number.

1022121010021 is a deficient number, since it is larger than the sum of its proper divisors (39613763771).

1022121010021 is an frugal number, since it uses more digits than its factorization.

1022121010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5295400 (or 5295333 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1022121010021 its reverse (1200101212201), we get a palindrome (2222222222222).

The spelling of 1022121010021 in words is "one trillion, twenty-two billion, one hundred twenty-one million, ten thousand, twenty-one".