1021121011021 has 8 divisors (see below), whose sum is σ = 1021471616288. Its totient is φ = 1020770478000.

The previous prime is 1021121011013. The next prime is 1021121011037. The reversal of 1021121011021 is 1201101211201.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1021121011021 - 2³ = 1021121011013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021121010992 and 1021121011010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021121011091) 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, 45129091 + ... + 45151711.

It is an arithmetic number, because the mean of its divisors is an integer number (127683952036).

Almost surely, 2^{1021121011021} is an apocalyptic number.

It is an amenable number.

1021121011021 is a deficient number, since it is larger than the sum of its proper divisors (350605267).

1021121011021 is an equidigital number, since it uses as much as digits as its factorization.

1021121011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36123.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1021121011021 its reverse (1201101211201), we get a palindrome (2222222222222).

The spelling of 1021121011021 in words is "one trillion, twenty-one billion, one hundred twenty-one million, eleven thousand, twenty-one".