1020002101022 has 4 divisors (see below), whose sum is σ = 1530003151536. Its totient is φ = 510001050510.

The previous prime is 1020002101009. The next prime is 1020002101099. The reversal of 1020002101022 is 2201012000201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 1020002100994 and 1020002101012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255000525254 + ... + 255000525257.

It is an arithmetic number, because the mean of its divisors is an integer number (382500787884).

Almost surely, 2^{1020002101022} is an apocalyptic number.

1020002101022 is a deficient number, since it is larger than the sum of its proper divisors (510001050514).

1020002101022 is an equidigital number, since it uses as much as digits as its factorization.

1020002101022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510001050513.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1020002101022 its reverse (2201012000201), we get a palindrome (3221014101223).

It can be divided in two parts, 102000 and 2101022, that added together give a palindrome (2203022).

The spelling of 1020002101022 in words is "one trillion, twenty billion, two million, one hundred one thousand, twenty-two".