1021101120021 has 32 divisors (see below), whose sum is σ = 1422422876160. Its totient is φ = 650726645184.

The previous prime is 1021101120001. The next prime is 1021101120031. The reversal of 1021101120021 is 1200211011201.

It is not a de Polignac number, because 1021101120021 - 2⁶ = 1021101119957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021101119979 and 1021101120006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021101120001) 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, 47688700 + ... + 47710106.

It is an arithmetic number, because the mean of its divisors is an integer number (44450714880).

Almost surely, 2^{1021101120021} is an apocalyptic number.

It is an amenable number.

1021101120021 is a deficient number, since it is larger than the sum of its proper divisors (401321756139).

1021101120021 is a wasteful number, since it uses less digits than its factorization.

1021101120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26865.

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

Adding to 1021101120021 its reverse (1200211011201), we get a palindrome (2221312131222).

The spelling of 1021101120021 in words is "one trillion, twenty-one billion, one hundred one million, one hundred twenty thousand, twenty-one".