1022121001021 has 8 divisors (see below), whose sum is σ = 1077655008800. Its totient is φ = 966760809840.

The previous prime is 1022121001007. The next prime is 1022121001079. The reversal of 1022121001021 is 1201001212201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1022121001021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1022121000992 and 1022121001010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022121001091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43442070 + ... + 43465591.

It is an arithmetic number, because the mean of its divisors is an integer number (134706876100).

Almost surely, 2^{1022121001021} is an apocalyptic number.

It is an amenable number.

1022121001021 is a deficient number, since it is larger than the sum of its proper divisors (55534007779).

1022121001021 is an equidigital number, since it uses as much as digits as its factorization.

1022121001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86908299.

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

Adding to 1022121001021 its reverse (1201001212201), we get a palindrome (2223122213222).

The spelling of 1022121001021 in words is "one trillion, twenty-two billion, one hundred twenty-one million, one thousand, twenty-one".