1021202022021 has 8 divisors (see below), whose sum is σ = 1361607536640. Its totient is φ = 680798927712.

The previous prime is 1021202021993. The next prime is 1021202022037. The reversal of 1021202022021 is 1202202021201.

1021202022021 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1021202022021 - 2⁵ = 1021202021989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021202022121) 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, 951420 + ... + 1716858.

It is an arithmetic number, because the mean of its divisors is an integer number (170200942080).

Almost surely, 2^{1021202022021} is an apocalyptic number.

It is an amenable number.

1021202022021 is a deficient number, since it is larger than the sum of its proper divisors (340405514619).

1021202022021 is an equidigital number, since it uses as much as digits as its factorization.

1021202022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210155.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1021202022021 its reverse (1202202021201), we get a palindrome (2223404043222).

The spelling of 1021202022021 in words is "one trillion, twenty-one billion, two hundred two million, twenty-two thousand, twenty-one".