1021002021101 has 4 divisors (see below), whose sum is σ = 1074738969600. Its totient is φ = 967265072604.

The previous prime is 1021002021097. The next prime is 1021002021113. The reversal of 1021002021101 is 1011202001201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1021002021101 - 2² = 1021002021097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021002021131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26868474221 + ... + 26868474258.

It is an arithmetic number, because the mean of its divisors is an integer number (268684742400).

Almost surely, 2^{1021002021101} is an apocalyptic number.

It is an amenable number.

1021002021101 is a deficient number, since it is larger than the sum of its proper divisors (53736948499).

1021002021101 is an equidigital number, since it uses as much as digits as its factorization.

1021002021101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53736948498.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1021002021101 its reverse (1011202001201), we get a palindrome (2032204022302).

The spelling of 1021002021101 in words is "one trillion, twenty-one billion, two million, twenty-one thousand, one hundred one".