1021230312021 has 48 divisors (see below), whose sum is σ = 1546861275648. Its totient is φ = 648419904000.

The previous prime is 1021230311971. The next prime is 1021230312071. The reversal of 1021230312021 is 1202130321201.

1021230312021 is a `hidden beast` number, since 10 + 212 + 303 + 120 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (1021230311971) and next prime (1021230312071).

It is not a de Polignac number, because 1021230312021 - 2²¹ = 1021228214869 is a prime.

It is a super-2 number, since 2×1021230312021² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1021230311985 and 1021230312003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021230312071) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20481321 + ... + 20531121.

It is an arithmetic number, because the mean of its divisors is an integer number (32226276576).

Almost surely, 2^{1021230312021} is an apocalyptic number.

It is an amenable number.

1021230312021 is a deficient number, since it is larger than the sum of its proper divisors (525630963627).

1021230312021 is a wasteful number, since it uses less digits than its factorization.

1021230312021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51002 (or 50999 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1021230312021 its reverse (1202130321201), we get a palindrome (2223360633222).

The spelling of 1021230312021 in words is "one trillion, twenty-one billion, two hundred thirty million, three hundred twelve thousand, twenty-one".