1021002100022 has 4 divisors (see below), whose sum is σ = 1531503150036. Its totient is φ = 510501050010.

The previous prime is 1021002099979. The next prime is 1021002100081. The reversal of 1021002100022 is 2200012001201.

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 = 1021002099976 and 1021002100012.

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, 255250525004 + ... + 255250525007.

It is an arithmetic number, because the mean of its divisors is an integer number (382875787509).

Almost surely, 2^{1021002100022} is an apocalyptic number.

1021002100022 is a deficient number, since it is larger than the sum of its proper divisors (510501050014).

1021002100022 is an equidigital number, since it uses as much as digits as its factorization.

1021002100022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510501050013.

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

Adding to 1021002100022 its reverse (2200012001201), we get a palindrome (3221014101223).

The spelling of 1021002100022 in words is "one trillion, twenty-one billion, two million, one hundred thousand, twenty-two".