1021210101021 has 48 divisors (see below), whose sum is σ = 1585865119104. Its totient is φ = 582075648000.

The previous prime is 1021210101011. The next prime is 1021210101047. The reversal of 1021210101021 is 1201010121201.

It is not a de Polignac number, because 1021210101021 - 2⁶ = 1021210100957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021210100988 and 1021210101006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021210101011) 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, 8337936 + ... + 8459526.

It is an arithmetic number, because the mean of its divisors is an integer number (33038856648).

Almost surely, 2^{1021210101021} is an apocalyptic number.

1021210101021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1021210101021 is a deficient number, since it is larger than the sum of its proper divisors (564655018083).

1021210101021 is a wasteful number, since it uses less digits than its factorization.

1021210101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122994 (or 122983 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1021210101021 its reverse (1201010121201), we get a palindrome (2222220222222).

The spelling of 1021210101021 in words is "one trillion, twenty-one billion, two hundred ten million, one hundred one thousand, twenty-one".