1021212101021 has 32 divisors (see below), whose sum is σ = 1195753746432. Its totient is φ = 853958064960.

The previous prime is 1021212101017. The next prime is 1021212101033. The reversal of 1021212101021 is 1201012121201.

It is not a de Polignac number, because 1021212101021 - 2² = 1021212101017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021212100987 and 1021212101005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021212101011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 145946495 + ... + 145953491.

It is an arithmetic number, because the mean of its divisors is an integer number (37367304576).

Almost surely, 2^{1021212101021} is an apocalyptic number.

It is an amenable number.

1021212101021 is a deficient number, since it is larger than the sum of its proper divisors (174541645411).

1021212101021 is an equidigital number, since it uses as much as digits as its factorization.

1021212101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8409.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1021212101021 its reverse (1201012121201), we get a palindrome (2222224222222).

The spelling of 1021212101021 in words is "one trillion, twenty-one billion, two hundred twelve million, one hundred one thousand, twenty-one".